Season 1
Every day, Naoto Hachiouji is teased relentlessly by Hayase Nagatoro, a first year student he meets one day in the library while working on his manga. After reading his story and seeing his awkward demeanor, she decides from that moment on to toy with him, even calling him "Senpai" in lieu of using his real name.
At first, Nagatoro's relentless antics are more bothersome than anything and leave him feeling embarrassed, as he is forced to cater to her whims. However, as they spend more time together, a strange sort of friendship develops between them, and Naoto finds that life with Nagatoro can even be fun. But one thing's for sure: his days will never be dull again.
01. Senpai is a bit... / Senpai, don't you ever get angry?
Senpai is a nerdy high schooler whose manga work is discovered by some loud girls in the library. They all tease him, but one among them, Nagatoro, takes it further than the others.
02. You Got Your Wish, Senpai! / 'Sup, Senpai?!
Nagatoro torments Senpai by threatening to suck his blood like a vampire and by making him play a nipple-finding game. Senpai escapes to a family restaurant, where he runs into Nagatoro and her friends and discovers something surprising.
03. Let's Play Again, Senpai / Over Here, Senpai
Senpai and Nagatoro get caught in the rain. She invites him over to wait for the rain to pass. Senpai sits with Nagatoro and her friends for lunch, and things get awkward.
04. You're All Red, Senpai / Senpai, You Could Be a Little More...
Gamo-chan and Yosshi offer to let Senpai touch their breasts, but there’s a twist. Nagatoro offers a reward if Senpai does a good drawing of her.
05. Senpai's Poofball / Thanks, Senpai!
Nagatoro offers to cut Senpai’s hair. Just as she’s about to get started, she gets a call from her friends, and things take an odd turn. Senpai and Nagatoro line up for ice cream on a scorching summer day.
06. You're Such a Wimp, Senpai ♥ / Senpai! Let's Go to the Beach!!
Senpai awakens in another world, where he and Nekotoro set out on an adventure to defeat the demon king. Nagatoro invites Senpai to the beach.
07. Senpai, Want to Go to the Festival? / It's Like a Date, Huh, Senpai? / Let's Go Home, Senpai
The summer festival is coming up. Senpai is expecting Nagatoro to invite him, but that’s not how either of them end up going.
08. That Might Actually Be Fun, Senpai♥ / Let's Play Rock-Paper-Scissors, Senpai!!
Senpai should be studying for midterms, but he’s hooked on a game. Questions arise about what might happen if he were to flunk. Senpai and Nagatoro play rock-paper-scissors to see who has to carry their bags home.
09. Senpai's Such a Closet Perv!! / There's No Way Creepy Senpai Could Go on a Proper Date!!
Nagatoro makes a bet that Senpai has lewd books in the club room, but things don’t go quite as she plans. Sakura has a stalker, and she asks Senpai for help getting rid of him.
10. You Seem Pretty Stiff, Senpai / I'll Do It For You, Senpai!!
After seeing Senpai get mocked for his inability to run, Nagatoro takes him out jogging to try to whip him into shape. The culture festival is coming up, and Senpai needs something to present for the arts club.
11. What Do You Think, Senpai? / You Could Be More Honest, Senpai ♥
Senpai doesn’t have any confidence that he can win against the art club president. Nagatoro and the gang try to cheer him up, but the president’s art is just too powerful. Nagatoro offers to model for Senpai.
12. Has Spring Come Even for You, the Unpopular Loner Louse Senpai? / Did You Hear Her Talk About Love, Senpai?
Senpai isn’t sure he can beat the art club president in popularity at the culture festival. Nagatoro and the gang do everything they can to help him.