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

*"Synopsis:"" Akiteru Ooboshi lives by one rule: efficiency above all. As the producer of the 05th Floor Alliance, a small game development group made up of his apartment neighbors, he manages their latest hit, "The Night the Black Goat Screamed*, which unexpectedly hits a million downloads. To secure the circle’s future and guide their next projects to even greater success, Akiteru turns to Honeyplace Works, a major company run by his uncle, Makoto Tsukinomori. But his uncle sets an odd condition before agreeing to partner with them: Akiteru must pretend to be his cousin Mashiro’s boyfriend. Seeing no reason to refuse-it’s the most efficient solution-he agrees for his team’s sake. Complicating matters further is Iroha Kohinata, the younger sister of his fellow developer and best friend, Ozuma. A relentless tease, Iroha enjoys getting under Akiteru’s skin. As work, school, and personal life start to overlap, Akiteru finds himself caught between two girls who might just shape his entire future.