Maybe I went into this drama expecting too much. The leads were super cute, the bromance and friendships were sweet and awesome, OST was catchy, chemistry between the pair believable, plenty of cute and fluffy scenes, keeps reinforcing the message that being healthy internally is the best way to define beauty.
BUT.
Although the first few episodes were so feel good, funny and uplifting, slowly the drama started to veer towards sadness, ad placements, cliches and drama just for the sake of drama. The second lead couple were mostly annoying despite their back stories. Family dynamics on the ML side was absolutely messed up and never get to understand why the father was aloof, why the second wife and brother were treated so badly, why the chairman let the greedy uncle get away with so much, why the ML's mom was never shown. It doesn't explain why he needed to endure his childhood treatment alone and without love, although his grandmom was dearly fond of him.
Episode 13 was the most illogical development, with ML getting into an accident and deciding on completely stopping all communication with the FL because he decided to not let her in on his pain or to watch her suffer. This could have been digested as an immature decision if the ML was in his 20s, but a character in his 30s and holding a Director position of a conglomerate, a coach who has endured a lot of pain and helped others out of pain, deciding to behave this way felt unrealistic and immature.
They could have wrapped up the series by episode 12 or 14. The last 4 episodes had a lot of cliched moments and flashbacks which felt unnecessary.
Couple of things I felt super annoying and overly done were the FL's excessive use of flashing her dimples, the ML repeating that the FL's body was his, and repeated mentions of the FL being Daegu Venus. The final reveal of the FL again becoming fat at the end in a very short time, totally undoing every health message over the series didn't work as comedy for me. Also why would the ML who recently reunited with the FL go on volunteering work abroad leaving fiance, business, ailing father behind was a mystery. All in all, in trying to be too cute this series became a bit tiresome for me. It is an enjoyable one time watch but gets tiresome in binge mode.