Shiori has two older sisters, Amane and Misaki. People around him think he has a sister complex, so he decides to be remote and cold to them. But one day, he receives an email, "Send us a picture of you and your sisters kissing at school. If you don't, your...
Masaki was told by his father that he must marry one of the Tenjouin sisters: tsundere Yuzuna, tennen Sakura or pettanko Koyuri. And there’s also a maid who’s his osananajimi, a bracon imouto and a loli nurse.
