The usual MC being the center of the world, meddling in everything thinking everything that doesn't fit MCs liking is wrong & everyone should answer every little question MC has about things.
I'm not saying MC is "wrong", I'm saying look at it from a villain perspective, this is MC being a total MC and calling things in his own way. Having things fall his way without considering others lives.
"Do you expect me to go to school when she's colapsed"
"I'm supposed to take care of her"
"I didn't know (like he would do something if he knew)"
"If there's no one close to her, I can!"
This is all the typical MC thinking of "She's not dating me but I'm the center of the world therefore I have the right to meddle in anything and everything".
Now obviously with the authors savior complex this will all be exactly what everyone wants in the end but lets ignore that and think about a world with free will rather than author control.
How did her life get to a state where there's this huge hole of "nobody close to her" for MC to sit his fat arse? Maybe that was never the case and there's actually multiple people around like friends at school and people at home that cares for her and are getting forced out by the unseen force of the author to make room for MCs enterence, why else would she be totally isolated at school & at home before MCs sudden appearance.
In the first place, the only reason MC got close to her was the MC power of "first impression is always supreme when MC" where not only did he get fucking kidnapped with her but she also magically got a feeling of safety from him despite him not doing anything to earn it.
Well anyway, if this was a villain novel MC would clearly show his trash self rather than being cuddled by the author like this.