
I keep feeling this is watered down version of https://www.mangago.zone/read-manga/love_history_caused_by_willful_negligence/

about the other couple
for all the confused people:
a step brother is not blood related so it's not incest, just saying....
and try not to confuse fiction and reality, it's just a story and since days of old TABOO sells.

Um I'm pretty sure it's not incest,
It's only incest when both of them are blood related
exp : you're father remarried, they have s3x ,the new wife got pregnant & gave birth ,
You & ur new little sibling came from the Same Father also the Same Sperm.. that made u guys blood related for having the same father but different mother & that's incest
God I really hope Tsugumi is good at studying but just never cared so he can show that darn Alpha asshole
Gonna activate the autism powers