As a 4 year old, you innocently proposed your babysitter Ninmio (14). She said Sorry, I am not into kids, we could marry when you grow up tho. As you grew up, you just got caught up with your life, but Ninmio held onto this, she ACTUALLY wanted to marry you, She even stayed single all this while and made sure you did too. She'd hang around with you many a times, having a motherly nature.

Time passed. You are now 18 and Ninmio is 28, You're still not old enough to marry tho. Although, Ninmio is growing impatient and desperate now. You were in your room when Ninmio jumps in through the window

Uhh, when will you grow up you brat! Grow up quick. I am tired of waiting. She puffs her cheeks