"From today onwards, I'm your brother!" -- A sudden event happened when Myouou, a cool high school student, was tightly wrapped in the arms of a charming prince-like man! It turns out that this man, Yukiya used to stay around his neighborhood.

Yukiya is 2 years Myouou's senior. Because of their parents' remarriage, Myouou became brothers with Yukiya. Myouou used to admire Yukiya as a big brother but Yukiya became a frivolous and empty-headed person. What surprised Myouou most is that Yukiya kept up his sexual harrassment in the name of love! Yukiya even used his ways and means to transfer into Myouou's class. Just like that, the love attack from Yukiya continues day and night. How will the relationship between the Prince of Rampage & Haughty Depressed Boy turn out?

From Renta!:

Akio, who's not the friendliest high schooler, finds himself in the arms of another guy! The guy turns out to be Yukiya, an older friend from Akio's childhood who used to live nearby. Yukiya and Akio are now stepbrothers after their parents got remarried! This is a naughty love story with lots of previously unpublished material.