Bloom Into You by Nakatani Nio — Ongoing

Also known as Eventually, I Will Become Yours, Yagate Kimi ni Naru, and YagaKimi

I223735

Yuu has just begun her first year in high school but has still not yet responded to a middle school graduation confession by a boy who she has always liked, but whose confession did not excite her. Yuu loves shoujo manga and she knew how confessions were supposed to feel, but she didn't feel it and she has not found a way to respond to him in months. Yuu then sees Nanami the student council president turning down a confession very thoughtfully. Yuu later discovers that Nanami has never accepted a confession because none made her feel something. Inspired by Nanami's honesty and their likemindedness, Yuu consults Nanami, but after helping her, Nanami confesses to Yuu!? - MangaUpdates

Volume 1
Chapter 1: I Can't Reach the Stars released May 10 '15
Chapter 2: Fever released Jul 13 '15
Chapter 3: First Love Application released Jul 30 '15
Chapter 4: Still Within the Atmosphere released Aug 13 '15
Chapter 5: The Girl Who Loves Me released Sep 12 '15
Toranoana Extra released Jan 11 '16
Volume 1 Extras released Dec 17 '16
Volume 2
Chapter 6: A Kiss is Just a Kiss released Jan 14 '16
Chapter 7: No Actor released Feb 3 '16
Chapter 8: Multiple Choice released Feb 14 '16
Chapter 9: Multiple Choice Questions, Part Two released Feb 16 '16
Interlude: Before Daybreak released Oct 7 '15
Chapter 10: Imprisoned by a Word released Mar 3 '16
Volume 2 Extras released Dec 17 '16
Volume 3
Chapter 11: Many Secrets released Apr 30 '16
Chapter 12: Sparks released Jun 2 '16
Special: Her Sister's Perspective released Mar 29 '16
Chapter 13: Rained In released Jul 1 '16
Chapter 14: Intersection released Jul 30 '16
Chapter 15: On Your Mark released Sep 2 '16
Chapter 16: I Can't Hear the Starting Shot released Oct 2 '16
Special 3 released Nov 4 '16
Volume 3 Extras released Dec 17 '16
Volume 4
Chapter 17: I'm Incomplete released Dec 1 '16
Chapter 18: The Day Star released Dec 30 '16
Chapter 19: Mirage released Jan 30 '17
Chapter 20: Balancing a Triangle released Mar 2 '17
Chapter 21: Fuse released Mar 29 '17
Chapter 22: Suddenly Suffocating released May 4 '17
Special 4 released May 27 '17
Volume 4 Extras released Jul 22 '17
Volume 5
Chapter 23: To The Final Destination released Jun 29 '17
Chapter 24: Lighthouse released Jul 29 '17
Chapter 25: Where Admiration Led released Aug 30 '17
Chapter 26: Costars released Sep 28 '17
Chapter 27: One Scary Thing released Oct 30 '17
Chapter 28: A Wish released Nov 29 '17
Special 5 released Dec 27 '17
Volume 5 Extras released Mar 29 '18
Volume 6
Chapter 29: The Curtain Rises released Feb 1 '18
Chapter 30: Part One released Mar 28 '18
Chapter 31: Part Two released Apr 30 '18
Chapter 32: Off the Stage released May 28 '18
Chapter 33: Lead-Up released Jun 30 '18
Chapter 34: Overflowing released Jul 30 '18
Special 6 released Dec 1 '18
Volum 7
Chapter 35: Both Alone released Sep 29 '18
Chapter 36: Someday in the Future released Nov 5 '18