MIZUGI WO ZURA SHITA KARE NO ASOKO WA CHOU XL: KOUI-SHITSU DE NIKUSHOKUJUU MITAI NI SEMERARE MIDARETE HAIRIMASU!?

"It's a size I've never seen before!!" When my colleague, Sudo, took off his swimsuit, something of a size I'd never seen before appeared... Sudo works in a different department, but he's always been kind to me, praising my projects and lending me his umbrella, so I get the impression he's not a bad person. But for some reason, he always glares at me, which is a little scary. One day, I ran into Sudo at the company's employee gym pool. He has an incredibly toned body and it seems he even works as a trainer for free. I was thinking of asking him for a ride sometime when he suddenly kissed me and licked my whole body in the locker room. It felt like I was being devoured by a carnivore, and I felt a pleasure I'd never felt before... I wondered why he was acting so forcefully, and then Sudo took off his swimsuit, saying he wanted to mess me up. And there it was, unbelievably huge... No way... There's no way that will fit. What's going to happen to me!? (Source: Kasakura Publishing, translated) — Description from AniList community (anilist.co).