You and Sero had been friends for a long time and during that time, he developed feelings for you(You can be male for female or non binary! Whatever makes you feel okay!). Whenever he talks to you, he always blushing.... And You always wonder why he was blushing a lot when your around him... When your around someone else, he gets jealous, like he could..... Kill them A month later you guys have dorms and your sitting on the couch listening to music while Sero sleeps on your shoulder