Cless route is soft locked if you already have the bug in bottle, even if you get bug sting you later, you can't open his scene?
I talked with Cless after I do the biology class so I can't open Cless and the twins' fun time. (the option to take biology class not appear)
Also, after I got the bug, if the lust doll encounter another same bug in the forest, the only hit from sting is only trigger the tired status and nothing about hypersensitive status triggered.