A must watch Korean drama with love traingle

Just fell in love with this show. Every character has its own charm and have their own problems.
They way all characters interact with each other is key show the which make it intresting and hilarious.
Have a love triangle between the lead girl and two friends turned enemies.
Kim tan and Cha eun sang chemistry is fab.
The scenes between Kim tan and Choi Young-do ans between Choi Young-do and Cha eun sang is full dose of laughter.
Also Kim tan and Cha eun sang mom's interaction are hilarious too