Iroha Kohinata, My Friend's Little Sister, Hangs Out in Akiteru's Room... "My Friend's Little Sister Has It In for Me!" Episode 1 Synopsis & Preview Cuts Released

The synopsis, preview cuts, and web preview for Episode 1 of the anime "My Friend's Little Sister Has It In for Me!" have been released.
"My Friend's Little Sister Has It In for Me!" is a light novel series written by Ghost Mikawa. Akiteru Ooboshi (voiced by Haruki Ishiya) is a high schooler who rejects inefficient things—no socializing, no girlfriend, and dismisses all youth as inefficient. For some reason, his best friend's little sister, Iroha Kohinata (voiced by Sayumi Suzushiro), is constantly hanging out at his house. A cute but annoying girl (whom he never asked for) shows up, launching an irresistible, squirm-worthy rom-com full of annoying affection.