https://www.dlsite.com/ecchi-eng/work/=/product_id/RE257619.html
01-30 text
31-60 no text
61-65 misc.

thanks for the upload

Base +15, bob1909bob +6, Frank Arevalo +10, darkwing42 +31, titoloco +7

I hope this get translated, I love me some before/after scenarios

Base +7, Frank Arevalo +10, darkwing42 +31, ChazA4 +7, Flaming5604 +2, bob1909bob +6, titoloco +7

Characters in order:

Peach (Super Mario Bros.)
Daisy (Super Mario Bros.)
Rosalina (Super Mario Galaxy)
Zelda (The Legend of Zelda: Breath of the Wild)
Ruto and Saria (The Legend of Zelda: Ocarina of Time)
Midna (The Legend of Zelda: Twilight Princess)
Samus Aran (Metroid)
Palutena (Kid Icarus)
Krystal (Star Fox)
Lilina and Cecilia (Fire Emblem: The Binding Blade)
Lyn (Fire Emblem)
Micaiah (Fire Emblem: Radiant Dawn)
Lucina (Fire Emblem Awakening)
Corrin (Female) and Azura (Fire Emblem Fates)
Camilla and Hinoka (Fire Emblem Fates)
Mikoto (Fire Emblem Fates)
???
Ashley (WarioWare)
???
Callie and Marie (Splatoon)
Marina and Pearl (Splatoon 2)
Ribbon Girl (ARMS)
Minmin (ARMS)
Twintelle (ARMS)
Pyra (Xenoblade Chronicles 2)
Mythra (Xenoblade Chronicles 2)
Nia (Xenoblade Chronicles 2)
Mòrag Ladair (Xenoblade Chronicles 2)
Poppi QTπ (Xenoblade Chronicles 2)

Base +6, Frank Arevalo +12, titoloco +7

Page 18 has Panel de Pon characters:
For the top panel:
Top row, from left to right: Elias, Ruby, Thiana, Neris
Bottom row, from left to right: Flare, Sherbert, Windy, Seren, Lip

It's quite hard to tell who's who in the bottom panel, but I'll try.
First one on the left is probably Lip, due to the design of her sleeve and small shoes.
Second girl could be Windy, judging by her small shoes
Third girl looks like Flare, judging from her skirt
Fourth girl looks like Thiana, judging from the design of her skirt
Fifth girl might be Sherbert, but I'm not sure
Sixth could be Elias, judging by the longer boots
Seventh girl looks like Ruby, judging from her shoes
Eighth might be Seren, judging by how differently the skirt is drawn compared to the others
Ninth girl is Neris, because she's a mermaid

Page 20 has characters from Moero! Nekketsu Rhythm Damashii Osu! Tatakae! Ouendan 2. From left to right: Aoi Kanda, Sayaka Amemiya, and Anna Lindhurst

I'm sure someone else will out-autism me on this.

Base +6