I don't understand about R-40+ part. I think this manga is about a stressful parent thinking about their children 'pocket money' to college or their problem to pay their credit card bill on time or the difficulty to find a home that doesn't cut any trees so the environment still good for their childern
Although, instead of pocket money it is stressing over paying for college and the house bit has to do with being in a good school system. We are so so on trees.
I don't understand about R-40+ part. I think this manga is about a stressful parent thinking about their children 'pocket money' to college or their problem to pay their credit card bill on time or the difficulty to find a home that doesn't cut any trees so the environment still good for their childern