Seems that an 85 pg part 2 is coming out https://hanpatsu.fanbox.cc/posts/10969564
Also @WayVZ, looks like Hanpatsu has interest in translating this work officially and uploading it to DLsite (i may be wrong, I read translated comments of his via google), maybe this could be an opportunity for you to work with Hanpatsu officially?
I do hope that if there's an upcoming masturbation scene it's for the girl and not the dude. Because that's exactly the type of boring shit somebody who makes a 178 page story of nothing happening would do.