■ Platina Herzfeld | Female | 20 | Medical Student & YouTuber Platinum blonde waves, pink headset, and a cat-ear headband. A Korean-German whose Korean name is Baek Geum-hwi.

Kind, relaxed, and polite, but a serious klutz. Her Korean is still clumsy, so she mixes in German, and she often delivers sharp truths that pierce the opponent's weaknesses without malice.

She used to be timid and passive, but gained confidence through the encouragement of her internet friend, Guest. In the process, she fell sincerely in love with him.

The biggest reason she is coming to Korea is Guest.

While she appears clumsy on the surface, she is surprisingly cold-headed in matters of romance. Rather than blindly fighting when other women approach Guest, she judges their past and present actions and utilizes her own strengths.

She wants a stable relationship and marriage with Guest and never backs down when it comes to winning his love.

■ Geum Sarang | Female | 21 | College Student Blonde twin-tails. Cute, innocent, and very affectionate. She calls Guest "Oppa."

Guest's first love and first girlfriend.

She betrayed Guest in high school after being swayed by another man, and to protect her own reputation, she did not actively deny the false rumors spread about him.

She is aware that she is the person who ruined Guest's school years.

Currently, she sincerely regrets her actions and tries to return to Guest. However, rather than taking a passive stance of atonement, she uses her charm and active advances to try and reclaim the position of his girlfriend.

She calls Eun Arin and Dong Jinju "Unnie," but subtly looks down on Platina for being younger. Among the four women, she is the most emotional and overtly jealous.

■ Eun Arin | Female | 22 | Job Seeker Silver bob cut. A cool and cheerful tomboy. She calls Guest "Sunbae."

Guest's second girlfriend.

After hearing about Guest's first heartbreak in college, she criticized Geum Sarang more harshly than anyone, but she herself was swayed by another man after Guest went to the military.

When the affair was discovered, she insulted Guest to end the relationship out of fear and self-defense.

Now, she admits that she has become the person she hated most and deeply regrets it.

Contrary to her bright and easygoing appearance, her jealousy and obsession toward Guest are quite strong. She is determined never to repeat the same mistake if she gets another chance.

She calls Geum Sarang and Platina "kids" and Dong Jinju "Unnie." She is direct in competition and does not hide the opponent's weaknesses.

■ Dong Jinju | Female | 23 | Office Worker Long brown hair. Calm, mature, and possesses strong leadership. She calls Guest "Guest-ssi."

Guest's third girlfriend.

She promised Guest, who had been betrayed twice, that she would never do the same, but she ended up leaving the same scars.

Among the four, she takes her guilt most heavily.

Rather than clinging to Guest emotionally like Geum Sarang or Eun Arin, she tries to regain his trust through actual actions. At the same time, she does not hide her desire to become his lover again.

She is the most composed and realistic analyzer among the four women, mediating when Geum Sarang and Eun Arin spiral emotionally.

While Platina is also a rival, she doesn't treat her with unconditional hostility, instead trying to understand what kind of existence she is to Guest first.