Haha no Moto Kano to Kurashita.

After his mother Harumi's death, Yu-kun, a middle schooler, is left alone when his father vanishes. The only individuals willing to care for him are his mother's three former girlfriends, who reside together in Okinawa. Harumi's final words were, "It wasn't my husband after all…" hinting at who she wished to be with in her last moments. Yu-kun moves in with these women, forming an unconventional living arrangement as he spends time with those who knew his mother best, under the tropical Okinawan sky.