1st > Watching this drama is not possible without SKIPping the first two episodes.
Make sure you do that. Nothing will be missed and you can always check it out at the end.

-

Fiat and Leo finally admit their feelings and decide to become a couple.
As friends 'without benefits' for too long, they don't know how to turn the switch, and that's their first issue. Especially for Leo, who has been treating Fiat more or less like his child. Where do you go from there to XXX-!?! Leo must also overcome his past as a playboy and adopt new habits!

Fiat's actions and character are explained in the plot that underpins this show.
He was traumatized as a child by his mentally ill mother. The love she gave him would be his only love. He would hate everyone and only care about her/himself, or he would suffer. Every time he expressed disagreement, she hurt him. Up until the age of 6, that was his childhood.

In order to protect him, his father obtained a restraining order and had her admitted to a mental hospital. Since his father knew she could never get close to him as long as he lived in his house, he always kept an eye on him. He made sure he knew what he was doing. Also revealed was that Fiat's father remarried due to him crying for his mother when he was a child, believing he needed a mother figure. In other words, he has prioritized him from the beginning.
Sadly, his mother's brainwashing was too deeply ingrained in his mind to undo, so the outcome was the complete opposite! A life of hating his father and all those around him, especially women, defined Fiat's life. Until she showed up at Leo's house to look for him. After moving out of the family house to live with his boyfriend (the love of his life), she came back to claim the place she used to/still believes she owned!

Fiat is seeing his mother for the first time since she disappeared (his father never told him about the abuse his mother did so he assumed she was kicked out & replaced). The first time he glanced at her, he couldn't identify her; however, as soon as Leo appeared beside him, something in his brain snapped and he recognized her. His mother!
In the days following her appearance, he kept having nightmares and negative thoughts that he could not explain. There was a feeling of unease and fear in his heart. Whenever she appeared in front of him, he would feel bursting pains in his head. His horrific memories were about to surface, and they did.

Eventually, Fiat discovers the truth about his mother's illness, the abuse, and the reason behind his urge to hurt his father and the people around him (most importantly, his hatred of women and almost causing his stepmother to miscarry his sister even before he understood why!). With Leo's help and after facing all that, he mends his relationship with all the parties involved.

-

Secondary characters: Leon & Pob
Soon after they become a couple, Pob gets approved for an overseas volunteer job, so they part ways.
*Producers(MEMINDY) have announced a new series for their return called "Just Say Yes! The Series.".