When he read his diary and found Hakyung's ring that's when all his memories returned. As for more specific, when they go all the way for the first time and it keeps shifting to the diary and ring on the office tableヾ(❀╹◡╹)ノ~
ch 470 is so CHEFS KISS i love them and when little mo didn't want to walk in the house with his shoes because he thought they were dirty i'm gonna cry i love you
oo....