It is actually not, yet Mei-Shun called them so in her early childhood. (お)ままごと=(o) mama-goto, house playing was one of her favorite. It means to play a role of mother who serves good meal. She is not sure that was why she drew a omikuji related to harvest after finding that lovely plant the other day, while feels very happy. Shin’s one mentions fishing, together reminds them of good ancient days in Yayoi Period (300B.C.-250A.D.).