My recommendation is enjoy the first 8 episodes and then skip to the last one to finalise.
Jung Hae plays, 24 yr old, Seo Joon Hee convincingly as the besotted younger lover. He shows cuteness and strength of character that is very appealing. His romance with Yoon Jin Ah (Son Ye Jin) is sweet and believable. As the older lover Jin Ah is lovely in the beginning, however, the writer/director input to her character fails to keep this drama on track. Filler issues are over the top and frustrating for the viewer - the ex boyfriend turned dangerous stalker, the bullying abusive mother and the toxic workplace environment leave a very bad taste in my mouth as the hapless Jin Ah remains passively observing or avoiding or deliberately lying to keep reality at bay.
There is a repeated OST that becomes as annoying as the situations depicted.
I felt that the watcher is pulled along and not invited to learn any of the backstory or what drives the decisions being made.