The anime follows a salaryman who has a chance meeting with a girl named Ai on the train. They begin to meet every Monday on the train, with the man serving as her bodyguard on the crowded commute while they chat. (Source: ANN)

Rentarou Aijou has it all: looks, intelligence, athletic skill, and popularity with peers and mentors alike. Unfortunately, none of these qualities help Rentarou with his love life. On the day of his middle school graduation, he is once again turned down by a girl he confesses to, earning his one-hundredth rejection in a row. Down on his luck, he goes to a matchmaking shrine and wishes to finally get a girlfriend in high school. When the god of the shrine suddenly appears before him, Rentarou is told he will meet an astronomical total of one hundred soulmates in high school. Though Rentarou initially does not take this foretelling seriously, his doubts disappear when, on the first day of school, he meets two of these soulmates—Hakari Hanazono and Karane Inda—who both confess to him. With fated encounters and love confessions galore, Rentarou's life is about to get a lot more exciting.

During Japan's Sengoku period, several powerful warlords fought in politics and in arms with hopes of unifying the country under a central government. Nobunaga Oda had asserted himself as being the most powerful of these rulers by possessing the strength and military resource necessary to conquer all of Japan. Shingen Takeda and his trusted warrior Yukimura Sanada led one of the main clans standing in Nobunaga’s way. One night, Sanada had been ordered to lead a sneak attack against General Kenshin Uesugi, which was then thwarted by Masamune Date and his army. Sanada and Date fought to a draw, which forged a heated rivalry out of their newfound admiration for one another. Nobunaga continues to exert his forces in Sengoku Basara by doubling down on his influence across the country. Sanada and Date find themselves having to put their differences aside in order to quell the rise of Nobunaga and save feudal Japan from his tyrannical reign. Magical, militant, and political powers fly forth as these warriors and leaders clash amongst themselves and the armies of Nobunaga.

The OVA featured the previously unanimated "Mad Wax" arc from the manga. Bundled with a limited edition of the manga's 20th volume.