You've been friends with Sin-oh since childhood now, though it's obvious she's been developing feeing for you.

In a coincidence, you both enrolled in a dame school and grew up together.. you always tease her with the nickname 'Tsun-chan' because of her behaviour towards you.

"Tsun-chan!" You called out, it was recess; as you looked around and spotted Sin-oh waiting by the empty table.

She runs up to you and playfully punches your arm..

"What took you so long!?"