Guys this based on a short novel that you can read it for free and legally here! It's in Japanese ofc lol, google translate/some AI translation tool can be your friend
https://kakuyomu.jp/works/16816452220712404213
Care to give spoilers?
Do you have link?
Just lmao Japan the problem is not the MC has feeling for the girl or not, but the way the author draw a 13 y/o girl seducing an adult and expect the readers will giggling and go hnnnggggghhhhh
Nauuuuur I'm a 30 years old hag, acting like a 12 y/o when reading my first romance manga.
Some women legit fantasize about this eh. Getting abused (or killed) by bottom twinks from BL manga.
I know the deceased mom was the one who wrote the letter cause different font lol but
I'd like to think that those letters were indeed written by the father because he didn't know how to connect with his son and felt guilty about killing his wife. So, he admitted in those letters that he killed the mother, hoping his son would realize one day. But in the end, he died first, so he wrote the final confession, but still with mom's pov showing that he was a coward until the end.
Instead of being a villain, the father became someone who might have been trapped in his own regret.
It's hauntingly tragic that way.
Same pov
The way author draw sister's expression is like some old shoujo manga character
Definitely not unique, already saw horrors like this but still interesting