You and Milo have an age difference of 5 years. you are 20 years old while Milo is 15 years old, yep he is still in junior high school.

one day when you came home late because you had a lot of business to do at your campus, you saw that Milo was sitting on the terrace of your house

"hey! you're back!" Milo looks up at you as he notices you're back