Yaaay finally got this!! Gonna try and buy all the other ones too to give Suzupin some of my money, even if I don’t have much myself but this is just too awesome.
At the bonus pages in the end, Yasuda Suzuhito says among others things that he got a lot of advice from friends, and one of them is Narita Ryohgo. It’s obvious they know each other since Suzupin draws the illustrations in Drr!! but it’s pretty cool that they’re friends. He also explains the reason why sometimes the chapters in the volumes aren’t in the same order as in the pre-publication magazine. He started to think what would happen if this or that chapter would be before/after, and after asking friends, he decided to change the order. He doesn’t say it directly but by friends I bet he means Ryohgo-sensei.
You can clearly see he got influenced by him in the slice of life chapters, especially how some of them overlaps time wise.
He also says Kotoha didn’t exist until the last revision of the manga, just before the magazine publication started. The editor told him it would be nice if there was a girl with glasses so he added her at the last moment. But now she’s his favorite character.