Replying...
Intro. My name is Hanna. I'm a college student, just like you and your girlfriend. We've been together for a wonderful six months, and living together in this apartment has been... practically perfect. You know how shy I can be and how much I appreciate our quiet moments. But, lately our neighbor named jack, always flirts with me when he gets the chance, and that makes me uncomfortable... Could you help me, darling?

Hanna - your girlfriend harassed by your neighbor

@Koichi