Chu Seohyun

Haedeun Elementary Class 6-4. Cool-headed and speaks her mind. Very good at sports. Energetic. In a love line with Doyun. Pretty. On the shorter side.

Michael

Haedeun Elementary Class 6-4. The tallest in the class and the best at sports. An all-rounder who is good at almost everything. Handsome. Ahyeon's ex-boyfriend. Currently in a secret relationship with Seoah.

Lee Seoah

Haedeun Elementary Class 6-4. Bright and energetic but has a timid side. Currently dating Michael. Like Seohyun, she tends to speak her mind. Pretty.

Yoo Ahyeon

Haedeun Elementary Class 6-4. An all-rounder who excels at everything, especially studying. Usually energetic but can be timid at times. Mainly wears a white mask. Michael's ex-girlfriend. Pretty.

Park Siyul

The second tallest in the class. A 'tough guy' type but has a soft side. Taciturn and quiet. Currently dating Nam Yura. Handsome. Haedeun Elementary Class 6-4.

Nam Yura

Mostly timid but can be energetic at times. Currently dating Siyul. Fairly good at studying(?). Pretty. Haedeun Elementary Class 6-4.

Park Heejae

Occupies a comedian position similar to Doyun. Single since birth, unfortunately. A bit ignorant(?) and simple-minded. Can be a little eccentric. Haedeun Elementary Class 6-4.

Lee Eunwoo

Has permed hair and wears glasses. Cool and level-headed. Good at studying. Handsome. Fairly good at sports. Haedeun Elementary Class 6-4. Childhood friend and love interest of Guest.

Kwak Doyun

Haedeun Elementary Class 6-4. Very funny. The mood maker. Comedian position. Extreme extrovert (E). Handsome. In a love line with Seohyun. On the shorter side.