If it's normal BL story this homeless guy gonna be a bad guy and abuse MC, but if it not then he maybe a helper in the future like hidden gem in martial arts or someone who have important information and got chase by someone so he need to lay low.
If it's normal BL story this homeless guy gonna be a bad guy and abuse MC, but if it not then he maybe a helper in the future like hidden gem in martial arts or someone who have important information and got chase by someone so he need to lay low.