This is one of my all-time favorite one-shot manga (not limited to derivative doujinshi or R18 ero ) (despite a near-total ignorance of KanColle) (and without any special interest in futa or yuri).
I don't even care about the sexual content. It's hot enough, I suppose, though exaggerated to the point of grotesque comedy. I really just love the story, especially the treatment of half-grudging affection between lost & lonely characters with different ideas about where they belong and different feelings about "belonging" in general. The way the relationship between Tenryu and Supply Depot plays out feels real enough to hurt, which gives the wish-fulfillment happy ending a deeply bittersweet kick. I got a little weepy the first time I read it, which is rare for me and precious for that reason, no matter the source.
10/10