In a video, Riku did “sports” with another YouTuber. His friend courageously grabbed him between the legs, which Riku obviously liked. In any case, his pants have bulged out nicely. The "tent" was also visible as he lifted his naked friend over him. Before he started the “exercise,” he gave his friend a slap on the bottom. Unfortunately, he then hid his bulge behind his smartphone. It would have been cool if he was naked too. Then you could have seen his aroused better.