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

Overview
Akiteru Oboshi, a high school student, views the typical experiences of youth—fun, friendships, and romance—as pointless distractions. So when his best friend's sister, Iroha Kohinata, relentlessly teases him, he can't help but feel irritated. She seems to invade his space constantly, often lounging on his bed, embodying a whirlwind of clinginess. It drives him crazy that she only acts this way when she's around him!
Episodes
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1

My Friend's Little Sister Has It In for Me
Akiteru is focused on building his future, yet his friend’s younger sister keeps disrupting his peace.
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2

The Cousin I Haven't Seen in Years Is Cold to Me
With Mashiro now settled into her new school, Akiteru faces the challenge of getting her to let her guard down and share more of herself with him.
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3

Only I Can Be a Pain to My Uncle’s Daughter
Akiteru plans to host a welcome party for Mashiro, but first, he needs to persuade her to join in the celebration.
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4

My Friend's Little Sister Might Be a Delinquent
Akiteru and Iroha recall how they first met.
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9

The Response to the Confession: The Fake Girlfriend is Tough.
Is Akiteru’s friend’s little sister actually becoming less bothersome? Used to her typical antics, Akiteru is taken aback when Ayaha unexpectedly ...