Meh, I understand... I went through this reason with Dev, Kamus, although he creates cool games that I had my eye on "Gremory Live and Shinigami Brothel" however through the vote on Pantreon he will always develop Sarada Training, even When the content of this game is complete, new scenes are added, while the other two games are always forgotten at the bottom!
"But what are you talking about sacred frames and chess being mandatory to continue to next chapter? Are they not optional bonus content?" Yes, I finished the 4 chapters of this game yesterday and today and the problem here is that you have to stay Keep an eye on the scenes where some icons and you have to click and collect "Sacred Flames" along with status, it's a boring minigame and to release the next chapter, otherwise you are forced to repeat the entire previous chapter to release the next one. Lucky for me, the guys from the f95zone forum community made the chapter cheats available and just by typing it in you can release everything and be able to just focus on the story.
"You're being too hard on Issei because although I agree with you that he's insufferable in the anime..." I'm sorry if it seemed like that but it's reality, I liked Issei when I watched DXD when the anime was released in mid-2012. However, time passed and passed, my mentality changed and when I rewatched DxD again until the third season, I asked myself how Could I like such a stupid character?
It got even worse when I decided to read the light novels due to the failure of the animation that started in the third season and continued until the fourth season. I didn't like how Issei grew in the work and developed, his development didn't come from his point of him, he was simply a lazy asshole who received help from everyone.
Even at this point, I prefer Vali Lucifer but he was a cold bastard that sometimes I didn't like. Anyway, Issei's development was something I couldn't stand, and it got to the point that I continued reading the Novel just because of the girls who were my Waifu.
"And after all the character development and relationship building in the anime, don't you mind that the girls who were in love with Issei were having sex with a random stranger?" Nah, it was better than seeing Issei who was a big pervert but at the H-time, he weakened and that's why I never considered a harem king like "Basara from shin maou no testament and Arata from Monogatari".
"If there was at least relationship building to justify girls getting close to this new character, could I accept it if Issei was dead and genuine love grew with the new character?" I would even recommend Kamus' "Gremory Live", what a cool little game. In this game, Issei is killed in the last confrontation, and you play with a character that can be one of 3 races, demon, human or angel... take it from me, choose angel, it's funny and tense at the same time , your relationship with Rias. After all, in the last holy battle you almost died the same one that Issei died, and was rescued by Rias... biggest plot twist "if you are an angel", and also Mc has sacred gear that every time he dies it activates the balance break and it's crazy come back to life xD! The only problem with this game is Patreon dictating through polls what Dev should continue developing or not!
"But this isn't the anime, it's an adult visual novel, which means your perversion will no longer be censored with grotesque comedy relief" yes, I was scared of playing this game but I gave it a chance and found it acceptable, due to the fact that I can change the MC's name, and I can also make choices making Issei less Simp!
"About the sex scenes in Devil's Academy here, I like them, but it bothers me that they happen between chapters and are not included in the actual story because each chapter starts right where the previous chapter left off, which implies that the scenes in between the content didn't actually happen." Yes, I was also really bothered by the scenes between the chapters, as if it were a small special that had no impact on the story in general.