Onii-chan_007

The drama is milked too much for its small premise. After one point the sequence of events get repetitive and unbearable. And there are too many 'coincidences'/plot conveniences making the plot too unrealistic for its genre.
Overall the story is bad. The acting is okay-ish. Perhaps the music was the strongest part.
Please don't watch this if you value your time. Coz this drama will only give you bad memories. You are better off re-watching your favourite series or something more highly rated.