The Anime Lad
Ryou is reincarnated in the fantasy world of Phi and hopes to spend his new life quietly learning water magic. He instead arrives in a remote region populated by creatures with firm objections to this plan. Optimism and cleverness are useful, but neither changes the local ecology.
Super Eyepatch Fox
Reincarnated in Phi, Ryou asks for a peaceful life devoted to water magic. His isolated destination offers dangerous wildlife instead. He must learn what his new magic can do while surviving a remote subcontinent with no easy refuge. The opening keeps its optimistic lead focused on the life he wanted, even as the environment changes what “going with the flow” requires.
Gigguku
Ryou reaches a fantasy world ready for a quiet life of learning water magic, then discovers that his remote new home is full of deadly monsters. I LOVE the mismatch. His optimism keeps the premise from becoming pure misery, while every threat makes magical study immediately practical.
Father's Basement
A reincarnated protagonist with natural magical promise is familiar territory, and the quiet-life wish arrives straight from the isekai shelf. The remote wilderness gives the opening a useful source of friction. Ryou wants time to learn water magic, but dangerous monsters make that study a survival requirement.