This free, fun, and surprisingly sweet story is all about the tentacles. But more than that, it's all about the boy with the tentacles -- Kip -- who is lonely, unloved (except for his sister, who's off to join the Peace Corp) and still suffering from being rejected by Aniket, his high school crush, when they both realised the same night he was a tentacle monster. Then, years later, Aniket walks back into his life.
Most tentacle stuff I've read -- crap, does that make me a fan? -- is all about the alien non-con, but not here. Here, the monster is just a sweet young guy with some unusual biology.
Read this one, guys. It's super short, super fun, and has some seriously hot scenes going on. Check this out even if you don't like tentacles, because Kip is such a lovely character that it won't take you long to see past them.