Online Vocal Lesson

Flex Lesson

Just record and send.
Sharpen your singing without breaking your pace.

Record your voice between production, streaming and posting, and send it via LINE. No camera. No lesson booking.

Try a Free Lesson First time only: free feedback on one chorus
No Face · Voice Only

No camera.
Just your voice.

No camera, no lesson booking, no video calls. Just send a recording via LINE.

No Face Required

No camera is used. All that matters is your voice.

Audio Only

Send a recording straight from your smartphone.

No Booking

Submit whenever you like, between production and streams.

All in LINE

No extra apps or complicated setup.

First Time Only

Free feedback
on one chorus.

Try it first, then decide whether to continue.

  • ¥0. Feel free to give it a try.
  • Record on your phone and send. No camera.
  • No pressure to sign up after the trial.

How to apply

  1. 1

    Add our official LINE

    Add us as a friend and send "Free Trial".

  2. 2

    Get the details

    We explain how the exchange works and how to send.

  3. 3

    Record and send

    Record a song you like and send it via LINE.

Apply for the Free Trial

Trainer

Manami Mori
Manami MoriMori Manami

Vocal Trainer
Vocalist / Singer-Songwriter

Background

From 2017, gained experience as a vocal trainer at a major vocal school.

Has taught over 1,000 students, working in a wide range of settings including group lessons at idol and TikTok agencies.

Moved to Tokyo after becoming an audition finalist. Has performed at many live houses in Tokyo, including morph-tokyo in Roppongi, as an acoustic solo artist and band vocalist.

Began serious DTM music production in 2020, expanding into composition, arrangement and music production.

Currently focuses on flex-time vocal lessons, giving guidance tailored to each person's voice and goals.

Message

Every singer has a different charm.

Voices are individual, and so are strengths and weaknesses. That is why, instead of applying one fixed method, I value finding the approach that suits each person's voice and challenges.

I myself have long engaged with music, not only through singing but through live performances and songwriting. Drawing on that experience, I want to deliver lessons that go beyond technical improvement, helping you know your own voice and enjoy singing more.

What do you need right now? Let us think it through together, one step at a time.

I would be glad to help you find the singing that is truly yours.

Vocal fundamentals Singing technique Expression Western music Songwriting support
Sample.
What it looks like

Here is what the feedback looks like.

Everything happens in LINE. Move forward only when you need to, between your activities.

01
A recording sent by a student via LINE

Submit your recording

Just send your recording via LINE.

02
Advice and a video sent back as a reply

Receive video and advice

You get your strengths and points to improve, in text and a demonstration video.

03
A thank-you and the re-recorded audio sent back

Re-record and submit based on the advice

Record again with those points in mind and send it once more.

Repeat steps 02 and 03 and refine your singing little by little

A real feedback lesson

Watch videos to see how feedback works.

Sample 01
Sample 02
How it works.
How it works

Keep your own pace.
Four steps to a better voice.

Sing, record and send via LINE

One chorus or the full song, it is up to you. A demo in progress, a cover before posting, or a song for a stream. Questions are welcome too.

Feedback by video and text

Advice from your trainer usually arrives within 24 hours.

Practice and send again

Practice with the advice and resubmit. Repeat as many times as you need.

Polish for the real thing

From recording an original song to posting a cover or going live, we organize your progress and support you all the way.

Record. Send. Improve.

Record it, send it, sharpen it.
A new singing habit that fits between your activities.

RecordRecord in your own setup
SendSend the audio via LINE
ImproveRefine with feedback
For You.
For you

Sound familiar?

Singer-Songwriter

Make your songs and your voice
even more appealing.

For singer-songwriters and original artists

  • I can write songs, but cannot express them as I want when recording
  • I want an objective view of what makes my voice appealing
  • I want to build expression and make my songs more convincing
VTuber

No camera needed,
and better cover videos.

For VTubers and cover creators

  • I want to take lessons with audio only, without showing my face
  • I want someone to check my cover before I post it
  • I want to improve without disrupting my posting and streaming plans
Streamer

Level up your singing streams.
Wow your listeners.

For streamers who sing live

  • I want highlights that make my singing streams more exciting
  • I want to polish my high notes and expression to surprise my listeners
  • My streaming schedule is irregular and I cannot attend regular lessons
Features.
Why Flex Lesson

Improve your singing without stopping your activities.
A new voice training with no camera.

Just record and send between production, streams and posts. You get thorough advice by video and text.

24 hours Reply from your trainer
Unlimited Feedback and questions during your plan
No cameraneeded Lessons done with audio only
Merits.
Benefits

What makes it good.

This lesson is for active creators who want to level up their singing in limited time. For the right person, I believe it leads to results faster than anywhere else. If it is not a fit, you can switch to in-person or online lessons, so feel free to try it.

MERIT 01

Ask anything
about music and singing

Ask via LINE anytime, whether it is pitch, how to sing the chorus, or anything else.

MERIT 02

Advice arrives
within 24 hours

Quick replies by video and text, so you can use them in your next practice.

MERIT 03

Unlimited feedback
during your plan

Resend until you are satisfied, and grow faster.

Voices

Voice

Words from students who have taken lessons.

Voice 01

Hello! Today was the results announcement!
And, wow!
103 votes
I ranked 174th out of over 3,000 entrants.
Both my votes and my ranking are personal bests.

I am glad I asked you for my very first voice training. Your teaching was easy to understand, so I picked things up quickly and got results this fast.

I hope we can work together again and aim for an even higher ranking next time.

Voice 02

I passed the video screening!!
Next is the final, third round, an in-person interview!

Thank you so much for supporting me this far! I am truly glad I asked you.

Your clear guidance and encouragement helped me stay positive.

Voice 03

Thank you for the lesson!

Thanks to your quick, careful responses and motivating, easy-to-understand coaching, I began to feel I want to try vocals, even though I used to feel uneasy about singing and did not much like my own voice.

Thank you also for suggesting concrete practice methods and goal-setting periods.

Voice 04

Very satisfied.

The response was very quick. Even though it was an individual review, getting it back in such a short time made me think, honestly, "professionals really are something." The advice was neatly organized into what I wanted to know: the good points, the points worth revisiting, and how to practice them. The delivered feedback video was easy to follow too, with red-pen marks on the lyrics so I could see the points visually, while the specific spots were explained as the video played. It was structured in a way that is easy to rewatch during future practice.

I think this is a very high-quality lesson for anyone who wants a professional's honest opinion and concrete things to be aware of and practice. I'm looking forward to using it again myself.

Voice 05

The explanations were very clear and careful, and I learned a lot. Since I practice by listening to the video explanations again and again, I also rated it highly that the teacher's voice is lovely and her way of speaking is bright, calm and easy to follow!

Voice 06

I've tried many kinds of voice training, but I never really came to like my own singing. This time I took the one-week lesson, spent the week facing my own singing, and came to like it a little.

I was nervous about doing it online at first, but being able to repeat the cycle of recording, sending, getting feedback, practicing and recording again several times within the week let me go at my own pace and made it very easy. The feedback came as text and video, and my questions were answered carefully. The quick responses were great, too.

Voice 07

The advice is always easy to understand, so I enjoy every lesson. Because I'm told the good points as well as what to improve, I can keep going without losing confidence in my singing. I expect to keep studying with her. She's a teacher I'd recommend to everyone!

Your Studio. Your Pace.

Plans

Pricing

Start with the free trial. Try it first, then choose your plan.

Start here · First time only

Free Trial ¥0

Free feedback on one chorus. Try Flex Lesson first.

Apply for the Free Trial
1 Week

1-Week Plan

¥3,000 / week
About ¥430 per day

Send as many recordings as you like during the week. Ideal for a short, focused push before posting a cover or going live.

Apply
Monthly

Monthly Plan

¥9,800 / month
About ¥330 per day

For those who want to steadily build expression while staying active. Unlimited feedback every month.

Apply
Reply within 24 hours Singing questions welcome Careful feedback by video and text
FAQ.
FAQ

Frequently asked questions

About the lesson

What is Flex Lesson?
You record your singing on your smartphone and send it via LINE. Your trainer replies with advice by video and text. There are no fixed days or times.
Is it a real-time lesson?
No. It runs as a loop of "send, then receive advice". You can submit whenever you like.
In what form is the advice given?
You receive feedback on your voice and technique as text and demo videos. Practice tracks are provided as needed.
Is it OK if I have just started my activities?
Yes. We support those who have just started posting or streaming, from the basics and tailored to your current singing.

Submissions and schedule

When should I send my recordings?
Whenever you like. Between production or streams, late at night, whatever suits your rhythm.
How soon does advice come back?
Usually within 24 hours. It may vary when we are busy.
Is it OK to skip a week?
Yes. You do not need to submit every week. Feel free to pause during busy live or streaming periods.

About the content

What can you review?
All aspects of singing: pitch, rhythm, expression, volume, high notes, vibrato and more, tailored to your goals and concerns. Songwriting consultation is also possible.
Can you review my favorite songs or originals?
Of course. R&B, Jazz and Neo Soul are my specialties, but I support you according to your goals. Recording your own songs, expression advice and basic vocal training alone are all possible.
Can VTubers and streamers take lessons?
Of course. No camera is needed and lessons are done with audio only. We can check covers before you post them and give feedback on songs for your singing streams. Feel free to send between streams.
Can you review songs for singing streams or covers?
Yes. We advise on pitch, expression and highlights based on the song and your posting or streaming plans.
I am not good at filming videos…
No camera is needed. Audio-only submissions are fine.

Any worries? Ask us

My schedule is irregular…
This lesson is made for you. There is no fixed schedule, so you can go ahead between production and streams.
I get nervous when it is showtime…
With recordings, you can retake as many times as you like at your own pace. You can review your singing in a relaxed state, which also helps before a performance.
Can I really improve?
By repeating "sing, record, improve", understanding and retention come more easily. Being easy to keep up is the biggest strength.
Will I be pressured to sign up after the trial?
No. Try it first, then decide whether to join.

Give it a try, no pressure.

Try it first, then decide whether to join. If it is not for you, that is perfectly fine. Please try it with no pressure.

Try a Free Lesson
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