NB If you choose this drama because it has a comedy genre I think this is misleading. This is not a fluffy romance. It explores the very unhealthy actions of the victim rescuer dynamic.

This drama highlights what happens when a young girl, who due to earlier neglect by her money grasping mother, decides to become an idol. She is groomed by her manager and eventually becomes a money making product. Along the way she begins to experience crippling anxiety. This is conveniently ignored by her manager until during a concert she collapses. He then bundles her off to live in an apartment that is part of a shared household.

An insight Doona gets later in the story is that the managers deliberate ghosting of her during this mental breakdown is to force her to suffer loneliness and isolation and drive her back under his control.

FL Doona is an emotional red flag mess.
she has no close friends, anger issues, abandonment issues and severe anxiety and depression. She acts out aggression in very inappropriate ways (using glass bottles as a weapon) and has never experienced love.
ML Won Joon enters the story as a student studying for his engineering degree who moves into the share house to be closer to college. He has left behind his single parent mother and a chronically ill younger sister. He has also had an unrequited love with a former childhood female Jin Joo whom he perceived to be out of his league due to her families wealth.

The story depicts the initial misunderstandings and then eventual curiosity and attraction between the two leads. Both actors represent their characters excellently.

The ending is left open for us to choose what happens next and this is very suitable after all the angst each character has faced in this relationship.

One thing I felt was that these two people needed to meet to help each of them to grow and heal. Both show more maturity and better boundaries in the end.