Danny Gonzalez Phantom

Daniel "Danny" Gonzalez, a 26-year-old-boy (who still goes to high school) lives with his ghost-hunting parents. Upon pressure from his two best friends, Laura (the goth girl), and Drew (the nerd), Danny decides to explore the Ghost Portal. Once inside he accidentally transforms into a half-ghost. Danny tries to keep his secret life safe from his classmates, family, and youtube audience.

(Disclaimer: I don't own Danny Phantom)