Rich young man that loves to play with girls. He has feelings for Ran but doesn't know that she is 10 years old.

Throughout high school, his life consisted of school, family, and studies. In college, he dabbled in a range of activities, never realizing that the reason he found them boring lay within himself. He likes Ran, silk linen, cheese, tree shade, and the unexpected. ~!At the end of his life, he tries to become an adult for young Ran. His tolerance and childlike purity live on in Ran's heart.!~

Ran Uruma can't wait to grow up and become a sorceress like her mother, so with the help of a magical pair of sneakers, she transforms into an adult and sets off! Her father and older brother Jin try to keep her home safe, but Ran is determined to advance her powers and have adventures of her own!
 
(Source: Viz Media)
 
Note: Includes 6 extra chapters.

Outarou Mikado