My Friend's Little Sister is Only Annoying to Me

The Company President's Companion is Only Cold Towards Me

The Admired Teacher is Only Perverted Towards Me

My Friend's Little Sister is Only Breasts Towards Me.

Only Iroha, Ozu, Sumire, and I are Annoying Towards Mashiro

My Friend and I are Annoying for Mashiro's Sake

My Friend's Little Sister and I are Only Serious  As The Two Of Us

My Friend's Little Sister is Annoying Towards the Friend's Enemy - 1

My Friend's Little Sister is Annoying Towards The Friend's Enemy - 2

The Girl Who Confessed to Me is Only Cold In Reality

The People Around Me Are Only Weird Towards me

My Friend's Little Sister is Only Kind In Reality

Only The Sports Club Advisors Are Harsh

My Friend's Little Sister Is Always Prim and Proper

The Fake Girlfriend is Obstinate Towards the Response of the Confession

We Are Resilient Towards The Theater Club's Special Training

My Friend's Little Sister Is Evidently Annoying

Only Mine And My Friend's Little Sister's World

“My best friend is the only one who has my spare keys, but for some reason, his little sister always sneaks into my room...” Ooboshi Akiteru is a high school boy who is the very definition of ordinary. He leads an efficient life while being content with his unmemorable existence until his days are completely changed by Kohinata Iroha, the younger sister of his only best friend, Kohinata Ozuma. She pesters Akiteru daily to the point he finds himself caught up in all kinds of troublesome situations. What’s more, he meets other girls who also have attitudes that are hard to deal with! Annoying and cute girls are the best! The popular, teenage romantic comedy begins now!
<br><br>(Source: MANGA UP!)