24 Jikan Kiss Dekinai24時間KISSできない; Cannot Kiss for 24 Hours; Cannot Kiss For 24 Hrs; no puedo besar por 24 horas(español latino)

A math teacher who has an intense relationship with the problem student, Kikusui Kiyoya. Even though they were a couple in love, one day, Sensei suddenly wants to break up...? The discontinued book by Hana Umezawa, her first BL work re-released.