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

If a girl teases you, that means she likes you! Unfortunately, Akiteru knows from experience that isn’t the case. Because every girl he interacts with shows him nothing but scorn, and he’s not scored a single date from it! Luckily, he’s more concerned with securing a spot for him and his game-development buddies at his uncle’s business. But when his uncle throws him a condition that involves playing the part of his daughter’s boyfriend, Akiteru has no choice but to take it. What will his best friend’s sister Iroha, who bullies him relentlessly, think of the news?

Akiteru's intent on living life as efficiently as possible. Ever since Mashiro's shock revelation, up's become down and nothing's as it seems! His friend's little sister went from Annoying with capital A to Sweet with capital S?! Mashiro's grown even colder than before, and he didn’t even think that was possible! His group's script writer's suddenly swapped genres, and even Murasaki Shikibu is sticking to deadlines! What's it all mean?! And how's Akiteru supposed to stick to being efficient when nothing makes sense anymore?

Summer vacation. For any high schooler, a time to let loose and have some fun! But for unfortunate Akiteru, it just means stress, stress, and even more stress! As if his fake relationship with Mashiro wasn’t enough, Sumire’s dropped a tremendous bombshell on him. Iroha’s back in force with a teasing vengeance, and now Midori’s acting mighty suspect too. Will Akiteru make it through the summer with his sanity intact? Or will the complex web of relationships finally spell his doom?

Mashiro has just shared a devastating secret with Sumire. Aki and Iroha have been forced through a ceremony that historically guarantees the participants will be married. Meanwhile, Sumire is on the brink of freedom—but just what will she choose to do with it? With the Alliance being pulled in all directions, will it even last the summer, or will it sink down into the depths of the ocean?

The Alliance is caught in a maelstrom of trouble as secrets are covered and uncovered everywhere you look! Unaware of this spiral of secrecy, Akiteru’s started seeing Iroha in a new light... And just his luck, his uncle shows up to make sure Akiteru sticks to playing the role of Mashiro’s fake boyfriend! Akiteru’s got no choice but to set up a (fake) date for the summer festival. Will someone like Iroha really sit back and just watch? What’ll become of the Alliance in this perfect storm of trouble? And...just who will Akiteru wind up watching the fireworks with?

With the summer festival behind them, it’s time for Akiteru to get back to finding Iroha a friend! But nothing ever goes according to plan. What’s he to do when his friend’s little sister doesn’t seem to have it in for him anymore? How can he find her a friend she can be annoying with when she doesn’t want to be annoying anymore? When Akiteru tries to talk some sense into her, she instead talks him into competing at the school’s culture festival for the title of...Queen Nevermore?! It’s now up to Akiteru to defy the odds and become the prettiest girl at school! But will that really help Iroha get back to her usual (annoyingly cute) self...?

With the culture festival behind them, it’s finally time for some rest and relaxation! Or it would be, were it not for the two-mom tag team ambush being sprung on Akiteru. With both mothers keen on interrogating Akiteru about his relationship with their daughters, there’ll be no time for relaxing at all! While Aki deals with them and tries to figure out what happened between his aunt and uncle, a battle rages on behind the screens as Mashiro and Iroha compete for his affections. Will things come to a head on the upcoming field trip, or does more disaster await?

The biggest event of your high school career has to be the field trip! Akiteru and his classmates are off to Kyoto to deepen their understanding of Japanese culture. But with Iroha out of the way, Mashiro’s more concerned about deepening her (fake) relationship with Akiteru! Too bad her plans are thrown into disarray when it turns out there’s a third girl vying for his affection. While Mashiro tries to come to terms with this new development, Iroha goes on a long-distance offensive to annoy Akiteru—but will that be enough to satisfy her? With trouble like this brewing, the class’s “relaxing” trip to the hot springs will be anything but!

Midori’s confession was the final push Akiteru needed to work out his feelings. But all that’s gotta wait, since he’s still in the middle of the class trip! Mashiro goes on offense and invites Akiteru on a date to Tenchido Eternaland, a Kyoto theme park. Iroha’s mother greets them with open arms...but wait, how’d Iroha end up at the park too? Add Iroha’s peskiness Akiteru’s list of problems, just when he was hoping he could catch a break. Aren’t theme parks supposed to be fun?!

The first time Akiteru met his friend’s little sister, Iroha, she was soft-spoken, with a diligent air about her. So when he heard she was interested in joining a gang—one led by none other than Otoi—he began to suspect there was more to Iroha than met the eye. When he intervened, things only got more complicated. And in the end, Akiteru formed bonds with unlikely friends for years to come. It’s finally time to unravel the secrets of the Alliance’s past! How did Akiteru come to form the 05th Floor Alliance, and why did Iroha decide to make him the victim of her teasing?