I liked it. What tropes are you after? Does he have to have a sister? For turning into cute little imoutos, you might like Ichinensei ni Nacchattara and Gatcha Gatcha Secret (same scanlator). "Pretty face," "Josh shougakise hajimemashita" (quit reading before it becomes stupid), chichi ga loli na mono de (no real sister character this time, sorry.) There's also "Atari Nikki" but it's very bad.

"Tsukiyo no fromage" if you like cute girls doing cute things, but it's not really TG, it's almost Kashimashi in how he doesn't react to changing sex.