Spoiler but it’s already explained in the recent chapters of the webtoon raws
Jiho had a crush on Donnie since the middle school days and he even confessed to her but with Donnies mindset... it went wrong so he says it was a joke to keep their friendship.
He changed for Donnie. I mean who would love someone with almost no personality?
Spoiler but it’s already explained in the recent chapters of the webtoon raws
Jiho had a crush on Donnie since the middle school days and he even confessed to her but with Donnies mindset... it went wrong so he says it was a joke to keep their friendship.
He changed for Donnie. I mean who would love someone with almost no personality?

Me knowing the reason why Jiho changed