Kenji, the eldest son of Masajiro, a wealthy moneylender, refuses to work in the family business and becomes obsessed with farming, jewelry and religion.

The bloodlines of "Oni" and "Momotaro" have been passed down among certain humans for generations. Long ago, the Oni, aware of their own ferocity, lived in seclusion. However, their peace was shattered by an invasion led by Momotaro. Over thousands of years, these two factions formed the "Momotaro Agency" and the "Oni Agency," respectively, and have been locked in conflict ever since. The protagonist, Shiki Ichinose, suddenly learns of his Oni lineage following an unexpected attack by Momotaro. This revelation sets Shiki on a path to discover the destiny that lies within his blood — a meeting with the Oni dwelling within him.

Naoko Tanaka is a 26-year-old office lady (OL). Her job is typical, but her workplace has fierce fights among different cliques. Other OLs are absorbed in the daily clique fighting. One day, due to an OL at the company, Naoko Tanaka's company is targeted by OL from all over Japan.

‘This is a visiting soapland service. How about you try our Ultimate Bliss Course?’ The mysterious soapland girl, Lovely Angel, who brings happiness to the unfortunate through climactic sex with a ‘happiness effect’, has returned! And now, another mysterious figure has appeared: the travelling SM girl, Black Angel, who challenges Lovely Angel! What will be the outcome of this showdown between ‘Lovely Angel’ and ‘Black Angel’?