Days after a heart-fluttering encounter with a charming man, Yu Na-bi bumps into him again; this time, she's formally introduced to Park Jae-eon.
As Na-bi wonders whether Jae-eon only acts friendly toward her or also to other women, she has a racy dream about the two of them in bed.
A cold, some jealousy, and a slight misunderstanding drive Na-bi and Jae-eon further apart before bringing them closer than ever before.
Na-bi's attraction to Jae-eon is enough to momentarily quiet her concerns about their intimate relationship, until a rude awakening sets in.
Sick of Jae-eon's ways, Na-bi ends things with him; Oh Bit-na makes a drunken confession; Yun Seol-a approaches Na-bi on campus.
Na-bi visits her hometown, where she helps out in her aunt's studio and enjoys the outdoors with Yang Do-hyeok; Jae-eon feels Na-bi's absence.
The students arrive at the guesthouse for a group retreat; Na-bi tries to keep a distance from Jae-eon who keeps his eye on her and Do-hyeok.
Do-hyeok surprises his childhood crush with a sweet confession; Na-bi visits a gallery with Jae-eon; Yun Sol gets honest about her feelings for Seo Ji-wan.
Afraid to lose Na-bi, Do-hyeok shows up in front of her building, only to see Jae-eon by her side; Sol allays Ji-wan's fears about their relationship.
Na-bi scrambles to recreate her sculpture days before the exhibit; staying true to his word, Jae-eon bids farewell to his butterflies.