Haruka is a sweet, innocent high school girl who is very excited to meet her new step-brother, Tsukasa who is in grade school. Tsukasa is in love with Haruka this manga is filled with short stories that take place in 'Your made matenai'.

Story 1 takes place 1 year after Tsukasa started to live with Haruka on her school trip.

Story 2 takes place 6 months after Tsukasa started to live with Haruka.

Side story of Haruka and Tsukasa is in 'Kakedashita Cupid' it is # 6) "Of Course I Can't Wait Until Nightfall" or (Mochiron Yorumade Matenai) if you want to read more short stories

Also includes:

O.HA.YO

Love Is Sometimes Like Rain