For his twentieth birthday, Yun Tae-o inherited his grandfather's house, but the reality of independent living quickly revealed itself to be less idyllic than he'd envisioned.

Han Song-i, Seo Do-hyeon, Oh Ga-rin, and Choe Hun arrived at Tae-o's, only to find him absent. Shortly thereafter, Tae-o received unsettling news concerning Song-i.

The circumstances of it were unclear, but Tae-o found himself unexpectedly sharing his home. And as he returned for a family dinner, more disheartening news regarding Song-i surfaced.

Tae-o pondered the overheard words, certain he understood their meaning. As a gesture of gratitude, Ga-rin hosted a party, which Do-hyeon attended.

Tae-o consistently misunderstands Song-i, deepening the existing ambiguity between them. Do-hyeon is curious to understand the nature of their connection.

Tae-o achieved a significant advance with Ryu Se-hyeon, but the reality of her home left him taken aback. Meanwhile, Do-hyeon and Song-i grappled with the uncertain nature of their connection.

Tae-o's worries regarding Song-i's enigmatic boyfriend intensify, and a sharp irritation flares within her when she discovers the object of his affection is someone she personally dislike.

Following Tae-o’s suggestion of a road trip, Do-hyeon and Se-hyeon readily joined the group. As they gathered, Tae-o noticed Song-i in the company of someone entirely unexpected.