Those expecting the semi typical genderswap cliches such as romance(best friend swaps genders, falls in love with best friend) will be largely disappointed, though there are some bits that may somewhat satisfy. It isn't entirely clear exactly what Junichi feels toward Gashou, though if I had to classify(others may draw different conclusions) it I would call it a bromance(really close friends who get along very well together in a deep, affectionate, but platonic way). It isn't entirely clear with the teasing Junichi does, and it seems open to interpretation.(that is to say whether Junichi is actually just teasing, or if he truly has romantic/sexual feelings towards Gashou)