1 - Such a lonely day and it's mine

Izuku Midoriya is a shut in who barely leaves his room. Katsuki Bakugou is a bully who finds his life beyond boring. Inko and Mitsuki decide to make the two rekindle their friendship from childhood in hopes that the two can help each other.

or

Shut in izuku gets help from bully katsuki and their lives change.