So Someya was a student teacher a year before. Sensei and "Someya2.0" had a big fight. Sensei (disappeared). Sensei probably went temporarily somewhere. -- A year later (now) Someya returned, finding Sensei. Someya efforts to improve their relationship. But Sensei saw "Someya2.0" with a woman leading to a hotel. -- Someya has either split personality or a twin brother.
So Someya was a student teacher a year before. Sensei and "Someya2.0" had a big fight. Sensei (disappeared). Sensei probably went temporarily somewhere.
--
A year later (now) Someya returned, finding Sensei. Someya efforts to improve their relationship. But Sensei saw "Someya2.0" with a woman leading to a hotel.
--
Someya has either split personality or a twin brother.