Absolute Regression - Chapter 42

This is the original, pre-serialization webcomic.

....

Senagaki Isaku will be a first year high school student starting in spring. Her grandfather is the third head of the Senagaki group, a yakuza organization, so she is feared by those around her. However, starting from spring, she hopes to make normal

Maruo Eiitirou (Ei-Chan), a first year honor student, one day decides he's unhappy with the way things are and lacks exercise. He finds a flyer for the Tennis Club and decides to check it out. He's instantly captivated by it. With no prior experience

In this remote seaside town, different people meet with their own confusions and misgivings. In the face of the deep blue sea, everyone can find their own answers. The Deep Blue journey of scuba diving and ordinary youth begins!

A lonely high school boy has started to feel that something is off recently, unknown memories began seeping into his mind. And then there is this strange girl he encountered. Everything culminates when his landlady turns into a monster in front of hi