Basically uke and seme are rival in high school. But then uke accidentally got hit by a ball (cmiiw) Uke then wake up in another multiverse when he and his rival are lover and they are about to do it.
https://www.mangago.zone/read-manga/i_m_banging_my_rival_from_a_parallel_world/
Basically uke and seme are rival in high school. But then uke accidentally got hit by a ball (cmiiw) Uke then wake up in another multiverse when he and his rival are lover and they are about to do it.