University juniors Pete and Kao are secretly dating. While Pete’s father accepts their relationship, Kao hasn’t yet come out to his mother, which frustrates Pete despite their otherwise happy relationship.

Kao becomes a tutor for a student named Non, which triggers Pete’s jealousy. Pete wants Kao to quit, but Kao insists—he needs the income to support his family.

Mork struggles with café work and burns his hand. Sun cares for him, and their connection begins to deepen. Rain questions Mork about his feelings toward his brother Sun.

On a trip to find coffee beans, Sun and Mork grow closer. Kao, still hiding his sexuality from his mother, envies Pete's open family situation.

Sun and Mork face unexpected trouble on their trip, but Mork steps up to protect Sun. Moved by Mork’s actions, Sun finally confesses his feelings.

During the Young Gear camp, Pete tries to steal moments alone with Kao. Meanwhile, Mork begins to seriously question his growing affection for Sun.

To celebrate their third anniversary, Kao surprises Pete. Pete returns the gesture with a fancy dinner. On the same day, Sun competes in a barista contest he’s been preparing for.

During the barista contest, a rude customer causes trouble at Blue Sky Café. Mork remembers Sun's words and restrains himself from fighting back—but the shop is left in chaos.

Misunderstandings grow. Pete decides to break up with Kao. Sun, upset about the café incident, refuses to hear Mork’s side of the story—leading Mork to quit. Both couples begin to drift apart.

Kao tries to suppress his pain from losing Pete, but then Non confesses to him, causing online rumors to spread. Rain encourages Sun and Mork to talk and clear the air.

During a live event, Pete exposes Non’s true colors. Kao runs to Pete, realizing the depth of his love. At Mork’s birthday, Sun gives him a heartfelt gift—though Mork still struggles to accept their relationship fully.