Basically the protag was told by his parents and Kana that he was cute all his life and he believed it and it became a huge part of who he was. He was being delusional about why he wasn't getting the treatment pretty people like Kana was. Nobody really dared to tell him in his face that he was plain
Then he heard his classmates talk about him and that's when he realized that he wasn't as cute as his parents and Kana said he was and that people saw him as plain and delusional
Oh I see thank you. Wow that actually quite surprised me. Seems like I was kind of off.
I will be honest I didn't really understand what was going on and I don't think it was due to the translation.
I guess the the protagonist has anxiety and thinks that people see him in a bad light.... and wanted to be seen as cute? I didn't really understand much else but I still enjoyed it