"Ah, who are you?! Don't you dare lay a hand on my Minoru-kun!!"

"Huh... I-is she talking about... Brother!? T-that's... impossible...!"

A chaotic scene unfolds before my eyes. The ones fighting are two girls who are complete opposites.

One is Mamori, my delicate younger sister whom I can't leave alone. The other is Saki, my glamorous, assertive, and doting childhood friend.

For some reason, both of them seem to be deeply in love with me.

Being simultaneously pursued by your sister and your childhood friend, what kind of romantic comedy manga is this?! ...Anyway, if I leave them be, I won't survive. I have to skillfully dodge their advances... No, this is definitely an impossible game!

What kind of ending awaits the love story between me and these girls――.