Because there's actually people who tend to be friends with a lonely person just because they feel pity looking at them, i mean we might feel grateful that they still talk to us but actually it feels like a shit when they start to be friends with us and then tell to their other friends that they're only doing that out of pity(i actually met that kind of person (︶︿︶)＝凸) and fyi a quite/lonely people don't need your useless pity,why would you even feel pity for them??they might be introvert but they still have some friends and people tend to be lonely because they wanted it(some might not)
Of course you can still talk to them and be friends with them but do it because you really wanted to not just because out of your pity when there's even nothing pitiful about
This one is actually good even though they're slowly getting to know each other and there's still no sex scene and they don't still have a romantic feelings for each other but i still love it lololol it looks pretty normal for me,i love how he is starting to be friends with him not because he felt pity for him for always being alone but because he's curious about him