An adult intentionally being loud even if there's a child's room next door, knows that the child has been in love with him and doesn't intend to respond to his feelings. The child is in high school, took advantage of puberty to be the adults type, but since the adult is so against falling in love, the adult simply teases the child. Anyway, the adult is weak to abandoned puppy looks and let the high school try and woo him. (the adult had the audacity to excuse his actions by thinking that it's the minor goi g after him)
Osanajimi ga Do M de Tsundere Nan Desu ga