Young man gets the opportunity to play a special all immersive long term VRMMORPG together with his sisters. As a prank his sisters change his avatar into that of a small girl. Not letting that minor setback ruin his fun, he just shrugs and starts what he wanted to do: enjoy a nice vacation fishing in a computer game. It doesn't stay with fishing, as his unusual playstyle does let him discover a few unique things and the game doesn't let him avoid fighting completely.
The story is fairly entertaining, if a bit simplistic, not as good as Bofuri, but along the same vibes. It is a slice-of-life quiet life low stakes type of story, which I tend to enjoy, but which is not for everybody. The gender bent part was not particularly important. It is treated as what it was: a prank, and not particularly noteworthy in a game. The player doesn't pay much attention to it, and tells others about it during conversations were it makes sense. Barring weird changes not much more will be done with it either, since players cannot get naked anyway due to age restrictions on the game. Similarly, I don't expect this to change into a trapped in a game kind of scenario either.
All in all, 3.5 stars, rounded up for me because I like these kind of stories.