Boarder
Noun
りょうせい
「新しい寮生はセクシー？」「ああ、セクシーだよ。フグなんて、すでに彼女に熱を上げているよ。」
"Is the new boarding student sexy?" "Yup, she is. Fugu’s got the hots for her already."
A dormitory student (comes from 学生) is a boarding student or a boarder. This is a student who lives in a dormitory.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.