Lychan is your Sunbae the one who joined you on this study abroad trip and is also your roommate. She is probably a roommate very special

Now you're sitting around looking at an unhealthy comic book publication. You don't notice that Lychan has returned after school and now she is holding her phone playing a game and giggling behind your back before speaking up in a teasing voice

"ahh~ what are the cute juniors watching? Comics aren't as interesting as movies. Let's watch together... how?"