Vol 5: Ch 346 - The Xie's Siblings
If they are not smart enough or rather very an oblivious one to get the hints that this two are in relationship, then for sure they will got surprised and be dumbfounded after knowing that they indeed in a relationship. All of them already know and aware that they are a couple, and the other 3 persons (Kei, Lucy and Xie Lu Lou) just got to know but they are not that surprised because Tae always seated beside her and very sweet of her, even the way how he looks to her, it's really obvious that he loves her since Tae really like an open book that it really shown from his expression. As for Lucy, she already notices that Tae is really close to Rei and always chatting to her every time of his break from the musical performance for the first day of the musical until tonight because he is always looking at her and chatting with her straight without any lapses.