Kiss De Okoshite.

ena is in her first year of high school and she keeps receiving confessions from weird guys. her friend miu, joking, says: “maybe you have a curse that forbids you to have a mutual love?” when ena's mother decides to remarry, ena discovers that she'll have a little brother and sister… however, the “little brother”, touma, actually has her same age, and he's handsome! since they don't have a blood relationship, touma says: “you absolutely can't fall in love with me, okay?” how will their relationship develop, now that they have become a family?