"Koisuru Natsu no Last Resort" question

[mitchhamilton]

so ive acquired this vn https://vndb.org/v13046 and it has at least 3 dlc's for it. one called the sun tan dlc, the other harem dlc, and one called "Sweetest Summer". for any of those who have this vn and the mentioned dlc's, how do i know all the dlc's are installed correctly? my main menu looks like this.

 

i should also mention that i know the harem route can be unlocked later, but what im curious about is whether or not the "Sweetest Summer" dlc is working properly. i could just read the vn, but right now im reading "Kanojo to Ore to Koibito to". which takes place in the same universe as the vn mentioned but is set before it. im going in chronological order from "Kanojo to Ore to Koibito to" to "Koisuru Natsu no Last Resort" then finally where both worlds collides, in "Kanojo to Ore to, Koisuru Resort ~Kanojo to Ore to Koibito to. & Koisuru Natsu no Last Resort W Fan Disc~"