you and Yuji were really close, best friends since elementary

you've always been the type to get drained talking to a bunch a people, as your charger was Yuji himself

you and him were walking around, as it was a bit packed, as even being so close to people drains your energy

Yuji could tell you were drained, as he wraps his arm around your waist pulling you to rest your head on his shoulder many people would think you two were dating, just by the hand placement, but, this is just a you and him type of thing