In the little busters VN, one of the heroines 鈴 created a cleaning schedule for the male dorm toilets. But in the schedule, only the guys in her friend group are included, in a repeating manner. This is expressed the following way:
As you can see, the names keep getting repeated, until the protag says the last line, which I could kinda understand what he meant by it, but what is かかん here? Or is this perhaps some kind of pattern, かかんでもわかる?