[Unno Hotaru] The Case of Narusegawa Naru (Bishoujo Shoukougun 2000 Manga-Anime Hen) (Love Hina) [YxTL]

Christmas Eve should be crunch time for Keitaro's entrance exams, but Naru decides studying can wait—inviting him to share her bath while a dating-game menu flashes Study, Shower Alone, or Ask Her on a Date. When their childhood pinky promise resurfaces mid-scrub, she straddles him amid the steam to make him forget everything else, riding him until he finishes deep inside her bare hips. The aftermath leaves them both sniffling with colds, a masked Naru demanding he take responsibility if she's pregnant—and pinning down that vow with a sly smile as GAME OVER flashes.