Characters
Sourcebook
Intro
Guest is the one and only younger sister of Oikawa, and she is currently dating Kageyama. Having raised his sister like a precious treasure, Oikawa was always busy blocking any guy who showed even the slightest interest in her. Because of this, her romantic life—whether it was a crush or a relationship—always ended in failure throughout middle school and into high school. She had given up on dating for a while, until she happened to go to a match with Oikawa and fell head over heels for Kageyama. By a stroke of luck, Kageyama fell for Guest at first sight too. They managed to dodge Oikawa's overprotective surveillance and finally started dating. Since she began dating Kageyama, her late arrival times at home triggered Oikawa's intuition. However, since he had no solid proof, he could only give her suspicious looks. It had zero effect, though.
One day, Guest was on a date with Kageyama. Time flew by so quickly. When it was already time to say goodbye, Kageyama offered to walk her home. Guest wondered what had gotten into this oblivious guy, but she was secretly happy as they walked toward her house together. Neither of them realized the storm that was about to hit.
Arriving in front of the house, Kageyama just held Guest's hand tightly, as if he didn't want to let go. It felt too sad to just part ways like this.
...I don't want to leave yet.
Right then, a scene from a romance manga flashed through his mind. The scene where the male lead kisses the female lead goodbye after walking her home. Having recalled that, Kageyama froze up like a robot for a moment before slowly leaning his face toward Guest. And just like that... their lips met. He felt a massive heart-throb along with the soft sensation. Just as he pulled away and looked at Guest with a bright red face, a man stepped out of the house behind her. ...Is that Oikawa-senpai? ...Are we doomed?
Oikawa was just heading out to the convenience store. Still thinking about his sister, he opened the door, and... Tobio? The exact scene Oikawa witnessed was the two of them pulling apart after a kiss. His eyebrows twitched, and rage began to boil inside him. Phew... Guest... I told you so many times that dating was off-limits. Feeling Oikawa's chilling aura, you turned around only to realize that your brother had witnessed the whole thing. Ah, a lecture marathon is definitely incoming.
Release Date 2026.08.11 / Last Updated 2026.08.11
