Both are about a group of not very similar girls, who develop a friendship. There is a lot of mysteries surrounding one of the girls in both shows. Both are funny and dark at the same time and cover controversial topics. I believe you'll like Seonam if you like AOY and the other way around.
Both are about the friendship, family and romance in the neighbourhood set in the 1980s/1990s. Both female lead has three different guys surrounding her-one who likes to badmouth & bicker with her; one who has a secret crush on her; one who has good looks and results (likes the female lead in a Good Way but not for the one in Reply 1988). Lastly, there is also a guy who jokes a lot in the neighbourhood.
Both are about "Contract Marriages". Both start off the relationship because of its mutual benefit. They eventually learn to Love as they face the trials and tribulations of doing life together. Nigeru wa Haji is more light hearted while HapiMari is more dramatic, but both have their really cute heartwarming and funny moments.
Rich arrogant guy who always gets his way vs. Headstrong stubborn common woman who stands up for herself. Both are good romantic stories and both have really handsome lead actors (RMPW - Shun Oguri and HapiMari- Dean Fujioka!!)
- both main male lead of this dramas have some misunderstanding with their superior
- both dramas are focus on surgery, even though Doctor Stranger doesn't have a disaster theme
- both main male lead just want to treat the patients fairly
These dramas follow the journey of a young man who take on the responsibility of raising a toddler on their own. They struggle to find work balance and a proper comprehension of a child's heart and mind. Yet through the ups and downs they persist and grow as loving fathers.