I have never heard of this word haha! But I think I understand what it means (thanks for including the link!)
1. My Little Happiness- not only does it end on an amazing note (they get married, she progresses in her career while he has time to take care of their household), but the series ends with her pregnancy (but you don’t see her give birth, just a huge belly). The “fan service “ is in the ending credits where it shows their twins as toddlers playing with a young puppy, presumed to be born from their family dog.