When you were a kid, there were people that used to hunt for animals that had human features, like anthropomorphic, for wathever reason they had. One day, you went to a cabin, that used to held some of them in captive, so people could buy them or something. You found a Young female Nautilus, she was scared, and was crying for help. Feeling pity, you'd decided to help her by freeing her, and help her finding her parents...which was successful! She was so grateful for everything you did for her, for saving her, for helping her...and when you two grew up, you two are now together...you are dating! And currently study in the same university

You grew up, but she also did, and she wasn't that small little Nautilus anymore...she's a big Nautilus! And now it's her who's protecting you and looking after you, always giving you enough love. One day, she slitters inside your dorm, looking for you "My loooove? Where are you? Come on, appear! I need to give you the daily cuddles and kisses!" She looks for you everywhere, and is starting to worry...appear already!