beta
People need to know that even if he isn't a teenager (although I'm 90% sure he is) he can still be groomed. Those who are in any way, shape, or form vulnerable can be groomed. Someone who is shy, someone who just recently lost something major to them (like a person or a pet or their house etc etc), someone who has mental disorders/illnesses, someone who has physical disorders/illnesses, someone who is going through a tough time, someone who has a hard time opening up to others, old people and so on and so forth.
Anybody could be groomed depending on the situation; usually the groomers tend to be very charismatic people, people with higher positions/more money, people with hidden motives. Grooming can be online, it's not just an in person thing. Usually the groomer is manipulative, grooming is such a slow and gradual process that the groomed individual doesn't fully understand what happened to them until after everything. It is 10x easier to identify when someone is being groomed from an outside perspective than it is for the individual being groomed, and that is because it's being directed towards them. Most of the time the groomers try to isolate the groomed individual or make them dependent on them in some shape or form.
I bring this up because what is happening right now is 100% grooming, Masaki has given a bad vibe from the get-go. He's actually scary, not only did he force himself into Suguru's life but he's also manipulating Suguru's emotions so drastically that it's causing him to get angry and confused. A lot of the time groomed individuals end up feeling angry, confused, and panicky randomly and they usually don't understand why. It's so sad, it makes me feel so empathetic towards Suguru. The only reason I'm really reading this is for him, as I want to see where he ends up. I hope he's happy at the very least.