Yeah, he's the one that brought Chiyome (the old lady) to the roof and jumped off after Ten showed up to kill her. So far unnamed, but he is one of the Neo-Seven since he's her grandchild.
While I do agree with you, Shinji Saijyo seems to think different... Heading into his later series, he's only going to lean into the ecchi factor more and more.
I mentioned that here on our website, but yes! We plan on completing the remainder of the series, including the mahjong spinoffs and the Gogyo spinoff.
They were removed due to the MangaDex DMCA that happened back in May. The earlier chapters are available on other sites, and are linked on our website.
The song Anzu is singing in the chapter is "Aisareru Hana Aisarenu Hana".
The chapter's name is also titled after a song (all the chapter names are!), with the song being "Good Morning Good Morning" by The Beatles.