Personnally after ch34 i can understand better why he wants to make friend with MC at school.
And i don't know ? I wonder what i am witnessing, it feels that maybe life could bring them all together as a pack, !!! To survive the harshness of winter. I don't want this guy to stay in the bunker forever, i just hope he can find his tribe, not only a romantic partner. I don't like the idea of the MC being the only person in the world taking care of him, it's nice that the other guy is kind of friendly or protective towards him too. (I suppose we will learn more about the said past events ...) _ i am invested !! Very curious (well i don't like love triangles so ... X-) i probably will ship all three together in my own little bubble lol) _ isn't this story more of a < coming of age story > rather than < Romance > ?
I think the author manages to make it hearthwarming somehow, (by miracle)

i like the main couple, i feel like they randomly threw in a second male lead which might be why i dont feel anything for him and the mc being together hes a cute character tho, i kinda hope to see him and the ml heal seeing how he was warning him abt his dad.