They said that opposite can't be friends, in their case, will this be true?

They are together since childhood, alam nila ang bawat liko ng bituka ng bawat isa. What if one day Aiden Lee, asked Serenity Xavie to pretend to be his girlfriend? Wala naman malisya sa kanila yung dahil ilang beses na nila ito nagawa. Will their act bloom into love this time? Or will it end in a bad way?