Heart-Pounding Planet

Jieum learns that Seungjo, the one she has secretly liked since she was in high school, now has a girlfriend. Feeling sad about her unrequited love, she tries to talk to someone and finds a chatting platform by the name of 'Witty', where she comes across a mysterious user whose handle is 'Jemulpo Puppy' and seems to cheer her up for a short time. After a break, Jieum comes back to school for the new semester only to be shocked to see 'Jemulpo Puppy' in person.

"How come this person is here?"

It is at the school that Jieum meets 'Jemulpo Puppy', to her great surprise.

"Hello, small stone!"