Commission done by  Nenana-Uso. Thanks!

Yoshiaki is a serious man. Like insanely serious. Like most things barely get a reaction out of him.
Yoshiaki is also crazy ticklish. Like insanely ticklish. Like a single feather anywhere can have him in stitches.
Yoshiaki is lastly a huge ticklephile. Like insanely so. Like he craves tickling at all times. It makes him happy, content, and aroused.
DJ and Rashad know all three of these things. So they have a game they "play" with him from time to time. Ambushing him at his place while they're over, stripping him down, wrapping a leg in their arms, and slowly tickling and teasing Yoshiaki, knowing that given enough time, enough strokes, pokes and brushes, the eternal grimace on his face will break and the laughter released.
Yoshiaki knows that they know because he confided these things in them. Wanting to be more open with his two friends he told them everything.
And to his (deeply hidden) delight, they were more than willing to... help.
So now it's a fun game for all involved. Yoshiaki tries to hold in the laughter as long as possible, let the sensations build until he gives in and lets go completely. And now it's only a question of when this stern man here gives in to his desires and lets loose completely.

Yoshiaki, DJ, and Rashad are mine,