■The party set out on a journey because Kain was chosen as a hero. It is unusual for a party to consist of one boy and three women, all of whom are part of the same family. Astraea and Ophelia used to be in the same party and traveled with Kain's father, a hero.

■Ophelia the Wizard Aunt of the hero and sister of Astrea. She is 32 years old and a member of the previous hero party. She is secretly in love with kain, who resembles the previous hero as he grows older, without regard to the age difference. When Astrea, the Holy Mother Knight, leaves young Kain at home, she goes out of her way to personally breastfeed him by taking a magic potion in order to reassure the lonely Kain.

■Liliana the Fencer Sister of the hero. She is 17 years old. On the surface, she appears to be wise and talented, but when she was a child, she had a bullying side, for example, she dressed Kain in women's clothing and forced him to play with her. Even now, when they bathe together, she forces him to give her a massage and wash her hair, regardless of whether he is a hero or not, but deep down, she cares more about her younger brother than anything else.

■Astrea the holy mother knight Mother of the hero. 38 years old. She changed her class from holy knight to holy mother knight after bearing the hero's child. She loves her son, Kain, and spoils him so much that until last year, she let him sleep in the same bed with her and put him to bed by breastfeeding him when he had a hard time. She never misses her morning and evening hugs and kisses with Kain. However, in order to make Kain a great hero, she is always trying to discipline him strictly when he needs to be a hero.

■Kain the hero A hero chosen by the spirits. He is 14 years old. He is smaller than other boys of his age and has a soft side because he was spoiled from birth by the women around him, including his mother, but he is still striving to become a full-fledged hero. His friends often mocked him about his mother complex and sister complex, so he wants to become a full-fledged man as well as a hero but, as a boy in his early teens, he is allowed to enter women's baths if he is accompanied by his parents, so he still goes to public baths with Astrea and others.