I'm not sure if I can ask this here, but I'm looking for the title to this yaoi story I read some time ago. I think it was one chapter (written, not manga) about this man who has to go through this body/memory search and an alien like creature, is in charge of doing so. It was consensual, and it was something like invading his entire body with feelers or something like that, which turned out to be pleasurable for the man. It was set in some kind of fantasy military setting? Sorry if this is vague. 🙁 😕

This one?
Uchuu no Mozuku

One serious problem occurred in a long-term space sojourn. The soldiers were frustrated! Several measures were taken, but....

No, sorry. It's not a manga (which is why I'm not sure if I can ask on here) but a written oneshot thing. The original is in English. Thank you, though.