Fushigi no Kuni no Shounen Arisu

A Japanese student named Arisu boards the wrong bus and finds himself in a homoerotic version of Lewis Carroll's Wonderland. In a place where people can change shapes at the drop of a hat, the last thing you want to do is drop the soap and announce yourself as Arisu, which sounds identical to Alice in Japanese. Doing so might just start making you look like her! And indeed, Arisu begins to transform, slowly but surely... (Source: Manga Updates)