The story follows Lee Seul-Bi, an angel who accidentally becomes human while trying to save a high school boy, Shin Woo-Hyun, from a life-threatening situation. As she adapts to her new life on Earth, she ends up living with Woo-Hyun and attending his high school. The drama explores themes of love, friendship, and the struggles of adolescence, with a fantasy twist. The presence of another key character, Hwang Sung-Yeol, adds complexity to the story, creating a love triangle. Both Woo-Hyun and Sung-Yeol face personal family issues, adding depth to their characters.

Key Characters:
1. Lee Seul-Bi (played by Kim Sae-Ron): An angel-turned-human who learns about life, love, and the challenges of being a teenager.
2. Shin Woo-Hyun (played by Nam Woo-Hyun): A popular yet emotionally scarred high school student who lives with his grandmother.
3. Hwang Sung-Yeol (played by Lee Sung-Yeol): Woo-Hyun's classmate and rival, who has his own struggles with family and relationships.
Kim Sae-Ron is so damn cute but there are these two leads - Nam Woo-Hyun and Lee Sung-Yeol - How can I not watch this drama?

The drama is lighthearted with moments of emotional depth. It appeals to a younger audience due to its high school setting and relatable issues. I appreciated its fantasy elements and the chemistry among the cast. However, I must criticize its storyline for being overly melodramatic at times.

Anyways, it's a fun watch, might be a decent drama if you wanna pass your time.