Does anyone know a manga where it involves brothers (not sure whether they are step or blood related) but the younger one, Seiji was really cute and all until he became a delinquent in highschool and he always glares at people who gets close to his older brother, Kouta. But in the end they get together, after a boy almost raped Seiji. Does anyone no this manga
thanks so much

It's probably "Love Prisoner Battle Line" from Koiyami Archive by Ike Reibun.