Hikigaya Hachiman and the 7 witches. (A crossover between Oregairu and Yamada and the 7 wictches.)

Hikigaya Hachiman, apathetic, isolated and friendless boy. Hachiman firmly believes that youth is simply an illusion created by hypocrites, for hypocrites are born from the ashes of past failures. Hachiman was the victim of verbal bullying which is reason for him to decided to stay alone and developed his apathetic & pessimistic attitude. He refuses to change, as he believes that no matter what changes the individual goes through, people will never change their view of the individual
Ryu Yamada, Yamada is always late for school, naps in class and gets abysmal grades. His life is a dead bore. He is a former delinquent too, but even though he's a delinquent, he helps people when they're in trouble. After many events that happened to him, he became nicer.. When an odd spiral of events revolving around the seven witches occurs, these two boys meet up and have to work together to fix what has happened.