"Anta Nante Okotowari" ("You? No thanks") by Miwako Sugiyama (1 volume-complete)
Yui transfers to an all-boy dorm to find true love after the boy she's in love with get married. Only 2 characters qualifies to be a bishie and the rest are irrelevant minor characters but let's wait and see. The guy's hair and freezing in the park is so Domyouji.