https://www.dlsite.com/maniax/work/=/product_id/RJ366405.html No idea what the game is about, screenshots are just close ups of faces.

@etar i played almost all there games, they normaly adopt girls from an actual anime so the quality is pretty high for CG or combat but it takes a long time playing

Chara from EP1 - Strike the blood EP2 - Hataraku Maou-sama!! EP3 - Toaru Majutsu no Index This one should be EP4

It's a series from CircleKAME about Dungeon 'Evil-kin' Slaying RPG, the enemies could be anything starting from demons. I got a share of fun playing it. Hmm... So they added a MALE PROTAGONIST on this Spin Off Episode... Or rather, a COMPILATION Episode. Which means, it includes all the EP1~3 and they did say + with an unsold EP. I guess the NTR tag now legal, both 'られ' and 'り'. I'll see if it worth it. No, don't make a conclusion that I'm NTR fanatic... Only being okay if the plot is reasonably solid.

From what I've read through iffy google translate the creator said EP4 is just story content to wrap the series up and supposedly does not have "scenes". Which I guess is why EP4 is fully downloadable through the trial on the games page. Only one way to find out.

Guess that's a One True End thingy that people would talk about, then. Considering it had no scene, it might be the most favored... What people called, "CANON" ending.

Confirmed. Needed the three games to be at v3.0 for its saves to work with this. According to the 'tutorial', EP4 is much better be played after clearing all the previous 3 games. Now we need all the previous games to be at v3 for save files compatibility; else, either just struggle at EP4 or play it again from EP1.