“I just love you sooooooo much, Senpai!” My name is Tomoki Yuuki, a second-year student in high school. I'd say I'm a fairly normal student, save for the fact that everyone avoids me like the plague because I apparently look like I'm out for blood. Ike Haruma is the only one that doesn't steer clear of me. He's your typical ‘perfect guy’ in every sense; the protagonist with no real flaws that you see in any given story. Life at school was going on as usual… until one day Haruma's super popular little sister confesses to me out of the blue?! Though she later clarifies that her feelings toward me are anything but romantic and that she has an ulterior motive, I end up accepting my new role as ‘fake boyfriend’ as a favor to Haruma. Believe it or not, the moment I start going out with her, Haruma's idol-tier childhood friend and my super hot teacher get involved with me too! Wait a minute, this can't be a dream rom-com scenario setting itself up for me, can it?! I mean, there's no way a side character like me could be popular, right? (Source: Tentai Books)

A self-proclaimed unattractive gloomy high schooler, Hiramiya Reiji, gets messed around by his friend's older sister, Sakuya, every time he goes to visit him at home. Drinking his drink as she pleases, barging into the bathroom, and crawling under his blanket in the middle of the night… Thinking that perhaps he has done something to make her dislike him, he asked his close friend whether he has any idea, but he only gets a reply in an incomprehensible way, *“you still haven't noticed it, huh”*. On a certain day, Reiji loses in a game and has to listen to 3 of Sakuya’s wishes. Reiji goes along with it even though he has doubts, but could he gradually begin to understand Sakuya’s true feelings…? This is the story of super dense youth and a can’t-be-honest older sister until they become a lovey-dovey married couple.