Birds of a feather flock together―. The mother-in-law, Reiko, and the daughter-in-law, Serina, have never gotten along, constantly clashing over everything. Years passed since they last saw each other, on a certain summer... Serina visits Reiko's house to borrow the 'seal' for integrating part of Reiko's furniture store with theirs, marking the beginning of the story. Reiko welcomes Serina with her usual vigor at her son's childhood home, which they haven't seen in years. For Serina, the longest and most unforgettable summer of her life begins...
