Oh, right, this is a thing.

So knocked out of it and pleasantly sleepy, Chikusa had honestly forgotten about Ken's own need, but he goes along with it easily enough as Ken forces him up against the wall. For the most part, he's completely limp against Ken's body, only his partner's pressure and the wall keeping him upright. However, he does move his arms, loosely wrapping them around Ken's waist and nudging his lips against his ear.

In his state, it's the most encouragement he can really give.