たて vs ほこ! ～最強の妹と無敵の幼馴染、恋の誘惑大合戦～

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

Being pursued by both my little sister and childhood friend at the same time, what kind of romantic comedy manga is this?!
...Anyway, I can't leave things as they are.
I have to skillfully fend off their advances...
No, that's impossible!

What kind of ending awaits my love for them...?

[Translated from DLsite]