
This is cute, but very superficial and generic.
They create a dramatic scene who could take it to a interesting twist, but resolve/just rush past it in the next slide. Also, reutilize a lot of scenes for flashbacks, like the stabbing incident, give us some new art/perspective!
The characters are also too 2d, not very deep in characterization and the history is basically about Doha, like, ik the actual MC is very mundane and boring, but at least give him a scene where he isn't talking/thinking about Doha.
I'm sure the author will probably try to "fix" some gap holes in the ending in a rushed form, just so they can draw them having sex again.

OKAY, the author kind of cooked with the love triangle, but they didn't have to make him his cousin, a close childhood friend would work already.
Also, poor baby, he's clearly not mentally well from all the abuse he suffered so far, and making a decision such as a bond at that state and age is horrible for him.
I honestly hoped he would tell Sentarou that he was the only one she relied on