It just feels like the corruption to bang more than two partners has not taken peak yet by chapter 3. She only committed to Satoshi and Kendo. The switch is just too much of a stretch, and the build up is not smooth. She has no real reason to commit to Arato. She got blackmail by Arato if you make Kendo stay, she won't tell Kendo. She is only afraid if Satoshi finds out? So what is the best thing to do? Bang Arato anyways? Right got it. Has nothing to do with money. Going to jail. Threat of harm, killing or image being damage by society. Just oh I don't want Satoshi to find out.I've not played the latest Shadow Patch, so can't comment there.
As for Mary, I saw her hooking up with Arato as an extension of her corruption from Kendo. He had brought her to the point of wanting sex all the time, enjoying the taboo of it, and a bad actor took advantage of that.
The jump made sense to me. Arato was at the right time in the right place and had the balls to take what he wanted.
There is also the issues with build up. The build up is only with the Satoshi as he encounters Shizuke a lot. Mary barely encounter with Arato aside from forcing to be there. This is all happening while she still banging Kendo. But if Kendo is force to leave by MC, bangs Arato anyways because drug, swinging, and Satoshi wants to bang the pink hair girl. This all happens right off the back. Would of make sense if Kendo and Arato have zero encounters with others and the branching route started from the beginning . Like Arato and kendo paths does not crosses each other and both have 1 to 5 chapters.
As Shadow of Desire, that is the number 1 game that really inspired me to create my own game. My series is in the very early stage. Still working on the plot, characters and overall premise. But I got a female model ready. Pray for me. Gonna be a long hobby and journey, with animations, background, more models and so on. Anyways SOD most recent update is a let down. You have to play all of the chapters though to get the disappointment.