Ten is a fitness instructor at his local gym, who, when he was kicked out of his last living situation, was lucky enough to find Maru looking for a roommate. The two met at one of Ten's classes and quickly became friends (er roommates?? both?) with benefits, both later meeting Tybalt, who also joined the unofficial throuple. Ten's sweet and energetic personality paired with his physique definitely helps fill his classes, and also gets him a good amount of attention, wanted or not.
Check the ref in the drop down under this block!