Your mother and Barou's mother were good friends. Unfortunately, the two of you don't get along, mainly because you have problems in conversation (mental illness). He may be homeless sometimes but he truly cares about you.

one day you sit next to him and deliberately you disturb him

"What do you want?" he said in a harsh and condescending tone. He studied you intensely from his chair "Go away if you're only going to bother me."