Air's manga / #School Life(1287)

https://manga.bilibili.com/detail/mc27708 uke one sided crush on girl one classmate, seme has one sided crush on uke. Uke has super power 1 day "hypothetical day" being able to live one extra day to know what is to come. Uke saw the future confession by seme. Tries to avoid him. Changed the future but saw a future where seme dies. Tried to change future again but power glitched and woke up in a parallel dimension where uke is in unrequited with a playboy like ( before was more meek / calm) seme who is at a different school (before was the same school) and his other friend doesn't recognize him either. Uke being bullied at his school (opposite to real world where classmates found out that the seme like the uke).

18/19 change in appearance/ find out he is an omega