Well...
Newbie, writing and playing.
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The protagonist won't be evil, the protagonist will be a little clever. The protagonist will be pure and cute. (Even I don't believe this.)
The protagonist was selling ice cream at a roadside stall, but he didn't expect to wear it. Although I watched a lot of anime and fanfiction in my previous life, I still couldn't react.
Finally, when the protagonist begins to hold on to the idea that he will definitely return to Earth, there will not be many emotional scenes. Later, when he has a bond, there will be emotional scenes.