I love how it started off eliminating any misunderstanding, and MC taking ownership once he realizes his mistake. Also ML not being too pushy about the incident and not asking for anything, while other BL's who ever got taken advantage would say "now you need take responsibility, you owe me xyz sex favors until I feel satisfied."
I kinda want to say the mom is a groomer, cause how she not know about the ML being part of the orphanage that she would frequent, then she would appear at the host club, to purchase him. Plus it appears that she's aware what's going on with her daughter and ML.