~~Doukyuusei Series~~

During rehearsal for a chorus festival, Kusakabe notices that Sajou is not singing and offers to help him practice. They start meeting every day after class to train. Because of this, even with completely different personalities, the two boys begin growing closer and developing feelings for each other.

1. Doukyuusei (Classmates) (Jul 25, 2006 to Jul 27, 2007) | 1 Volume 6 Chapters - Prologue / Parent Story / Prequel

Kusakabe reveals his dream to one day become a professional musician, Sajou is tirelessly preparing for college. Their differing goals bring an unspoken, heavy cloud over their relationship: as the boys approach their graduation, it is unclear what awaits their romance. Eventually, they will find the answer to their uncertain future together.

2. Sotsugyousei (Graduate) (Jan 25, 2008 to Aug 28, 2009) | 2 Volumes 16 Chapters - Sequel

Full color and black & white art collection. Included extra story

2.5. Sotsugyou Album: Doukyuusei & Sotsugyousei Koushiki Fanbook

Heartbroken, 37-year-old music teacher Manabu Hara tries to move on from Rihito Sajou. During a night out, Hara impulsively kisses an attractive man wearing glasses while imagining Sajou in his stead. To Hara's horror, the man turns out to be Aoto Sorano—one of his new students.

3. Sora to Hara (Dec 26, 2009 to Dec 22, 2011) | 1 Volume 9 Chapters - Spin-off of Doukyuusei & Sotsugyousei (Story of Teacher)

When Kinosaki, Sajou's classmate, learns about Sajou's relationship with Kusakabe, it takes him by surprise. Despite wanting Sajou all for himself, he is supportive of the couple. But, Kinosaki might not be a threat to their relationship, as the sight of the warmth between the two men shows that the future they are about to face together is too special to ruin

4.Occupation to Beloved(OB) (Apr 27, 2012 to Dec 27, 2013) | 2 Volumes 11 Chapters - Side story of Sora To Hara / Sequel to So

4.5. Graduation Certificate - Epilogue, artbook, sequel to O.B.

The former Touichi High School, where Manabu Hara still works as a music teacher, merges with another school to form Wakaba High. Given the news, Hikaru Kusakabe makes one last visit to the hallways full of warm memories he once made with Rihito Sajou. Meanwhile, Hara seems to have long moved on from Sajou—now living together with Aoto Sorano, his beloved boyfriend.

5. Dousoukai (Apr 28, 2015) | 1 Chapter - One-Shot

Differences aside, Hikaru Kusakabe and Rihito Sajou's hearts forever dance to the same sweet melody. Given their graduation day vow to eventually marry in the future, the couple come up with the same idea unbeknownst to the other: to gift a matching ring

6. Doukyuusei: Gold Ring & Silver Ring (Nov 5, 2016) | 1 Volume 2 Chapters - Side Story of Doukyuusei

Kusakabe's absence weighs heavily on Sajou, and when Kusakabe visits unannounced one day, Sajou breaks off their engagement. Although the love between them never waned, both Kusakabe and Sajou now have to navigate through their new normal and hope that, eventually, they will find their way back to each other.

7. Blanc (Feb 28, 2018 to Sep 16, 2020) | 2 Volumes 12 Chapters - Last part of three series

After years of battling the stubborn odds against them, Hikaru Kusakabe and Rihito Sajou are at last living together. Inside their modest apartment, there is now plenty to experience for the first time. Between sharing one coffee mug and learning each other's food preferences, Kusakabe and Sajou are growing ever closer—and very soon, they have issues just keeping their hands to themselves.

8. Futari Gurashi (Living Together) (Dec 28, 2020 to ?) | 1 Volume 5 Chapters - Extras of the p