I watched this epsiode on a train ride, with my mom looking over my shoulder curiously peeking, and it was so fun.
I love the swicth between pre love potion sin-yu vs post love potion sin-yu. Like it's a very sharp contrast, and I think is pretty well done.
At the end of the episode he follows her -not quite stalk her, since he's very upfront about it with her, so yeah..- and witness a pretty personal moment of her, and it can go both ways: as a breach of trust, or relationship building moment -also, for some reason it reminded me of episode 3, i think, of the season 2 of love alarm, when jojo supports hye-jeong and goes with him to visit his father (i'm describing this as loosely as I can) which was one of my favorite moments in that-.