Tonikawa: High School Days is a short 4 episode miniseries that basically makes up one miniature arc. I don’t know where the manga is at by comparison, so I don’t know if this is a case where the studio is waiting on the next arc to wrap before continuing with the story, or what. But what I do know is that this is a nice, warm and cozy little morsel to tide us over until we get the next arc.