Confession!?
well, it was a montage/actual kdramas are like an hour each so maybe there was some more downtime/'bonding' moments that you don't see on screen since this is a script and not a part of the main story but i guess these kinda 'romances' are pretty fast
wonder if it'll be some kinda forced love triangle or him having complicated feelings if he ever knows Hana is connected to mc's 'sociopathic' chara lol, if she doesn't feel betrayed of the concept of him "being rich all along" and using connections/pulling strings to help her