Interval Zero
Complete | Watarumi Naho,Suzukura Hal | 2011 released
2017-07-21 04:54 marked
Spinoff: Junketsu drop
Back to School
Complete | Oryu | 2019 released
2022-04-02 11:03 marked
Sequel/ Spinoff/ time skip story: https://www.mangago.me/read-manga/back_to_school_all_grown_up/
Back to School: All Grown Up
Complete | Oryu | 2000 released
2022-04-02 19:33 marked
Spinoff/ prequel: https://www.mangago.me/read-manga/back_to_school/
Torokeru kuchibiru
Complete | Takasaki Bosco | 2000 released
2022-04-09 11:01 marked
Spinoff/ prequel: https://www.mangago.me/read-manga/tadoru_yubi/
Tadoru Yubi
Complete | TAKASAKI Bosco | 2015 released
2016-10-31 00:10 marked
Spinoff/ sequel: https://www.mangago.me/read-manga/torokeru_kuchibiru/
Koi Ni Nare!