My Friend's Little Sister Has It In for Me!

友達の妹が俺にだけウザい

Akiteru Ōboshi, a high school student running the indie game dev circle 5th Floor Alliance, has a problem: Iroha Kohinata, the younger sister of his best friend Ozuma, bullies him at every opportunity — a far cry from the model honor student everyone else sees. Things get more complicated when his uncle offers support for the circle on one condition: Akiteru must pretend to date his cousin Mashiro Tsukinomori, who is transferring to his school to escape her own troubles.