Accidental or semi-intentional encounters within the household that lead to a forbidden romantic or sexual tension.
To understand the appeal of this keyword, it helps to break down the Japanese terminology used in the title: Tsuma no Sobo wa- Mada Mada Gen-eki Chou Bijuku...
"Still active" or "Still in the game." In this context, it implies that the character is still romantically and sexually viable, often possessing more "skill" or "energy" than younger characters. Tsuma no Sobo wa- Mada Mada Gen-eki Chou Bijuku...