Don't worry, you do understand. It's the MC in his previous life in the flashback. He did empathy like with the "blind" girl, so now present him is looking at past him.
Yes. Yes, I do comment in paragraphs. 
Dads, uncles, brothers, oh my! Check out list of (mostly) BL with kids: https://mangabuddy.com/manga-list/46295
Dads, uncles, brothers, oh my! Check out list of (mostly) BL with kids: https://mangabuddy.com/manga-list/46295