No it was good considering how every romcom ends, atleast one of the main leads didn't break up for others sake in last episode and had a reunion in last 5 minutes.
It was a good drama even though it had some annoying parts like whenever someone refused for something they gave very ridiculous reasons but good part was that unlike almost every every romcom there was no last episode breakup and last minute reunion.
It's so weird that everyone seemed suspicious at the start but I never expected everyone would actually turn out to be criminal, it was a new experience for kdramas.