I actually think the cinema group getting infected is because of Risa not Eiko. We know she is infected and she is shown cooking for the group which provides a lot of opportunity for her to accidentaly infect everyone. The group turns almost immidiately after eating the soup she makes so it seems to be the most proximate cause

A streamer, whose name begins R going to the "other side"? A likely story

If I had a nickel for every yuri manga about geting a girlfriend from space I would have three nickels. Which is not a lot but it's weird that it happened thrice

The hot spring scene is made so much funnier by Sorawo wearing a shirt that just says "I'm looking forward to it".
Yeah, I'm sure you are, girl.

Can't wait for Yuzu to discover the concept of friends with benefits