Thanks to interference from Yukino’s mom, Yukino and Yui’s plans for a Soubu High prom face ruin. But Hachiman has an idea: What if he were to devise a fake prom plan to make the girls’ version look better and disguise his scam as a genuine proposal? Of course, there’s no guarantee this delightfully devilish scheme will work, which is why Hachiman will need all the help he can get...

In spite of his best efforts, Hachiman still finds himself helping out his fellow students as a member of the Service Club. When delusional fantasy lover and fellow reject Zaimokuza tries to establish a "Playing Club," how will Hachiman, Yui, and Yukino handle his antics?

Soubu High’s queen bee, Yumiko, has come to the Service Club with a forlorn expression and a request: Find out Hayama’s plans for his educational track. Now it’s up to Hachiman to deduce the truth, and he’s well aware that cracking the flawless facade of the most popular guy in school is no small feat. But the attempt may just lead to some revelations—about Hayama, himself, and the weight of expectations.

As Valentine’s Day approaches, Yumiko is back with another request for the Service Club! She wants to figure out a way to give Hayama some chocolate, but standing in her way is his well-known policy of never accepting gifts on February 14. Hachiman, Yui, and Yukino decide to hold a cooking class as camouflage for some sweet exchanges, but their plan may lead to some unforeseen results-including a reminder of the unspoken feelings among the three of them...

After sharing her family history with Hachiman and Yui, Yukino asks for one final request: to watch her as she works to exceed her parents’ expectations. Not long after, Isshiki Iroha visits the trio looking to jazz up the annual celebration for the graduating seniors...by throwing a Western-style prom! Yukino sees this as a chance to prove herself and agrees to help, but there’s a catch -- she wants to do it alone rather than as part of the Service Club! While few can doubt Yukino’s capabilities, is she in over her head...? The final arc of this off-kilter youth romantic comedy begins!

Haruno orders Hachiman to leak the plans. Falling right in Haruno’s trap, Yukino’s Mother goes to the school to put a stop to the prom! And as Yukino and Hachiman discuss what happened with their little “competition,” something between them begins to shift...

The fake prom scheme has run its course, so it’s time to end the charade and relax a little with a karaoke party! But as the festivities wind down, Yui has a very personal request for Hachiman...one that has him thinking seriously about her. With the real Soubu High School prom on the horizon, what better setting is there for some classic teen drama?