Imagine living life as the vice president of the student council, passing the days eating snacks, playing games, and bonding with a harem of beautiful girls. This is exactly the kind of life that high school student Ken Sugisaki leads, or so he thinks! Usually, the officers of Hekiyou Academy's student council are elected by popular vote, but an additional position is granted to the student who scores the highest on the exams. Ken, who historically has had below average grades, worked hard to improve them to be accepted into the student council, with the ultimate goal of surrounding himself with girls who fawn over him. Unfortunately for the vice president, things do not go quite as planned. Not only do the ladies of the council continually rebuff his advances, they also prefer to focus on more important and boring activities, such as organizing school events and managing the other clubs. But a few minor hurdles like these won't stop Ken from chasing after his dreams, even if they seem a bit ridiculous.

Sugisaki Ken, through diligence and academic excellence, had successfully entered the paradise that is the Hekiyou Private Academy's Student Council. There, he boldly embarks on his plan to create his personal harem with the 4 girls who are the other council members, namely: The incredibly youthful president Sakurano Kurimu; The cool and kindly yet super-sadistic secretary Akaba Chizuru; Tomboyish and hot-blooded vice-president Shiina Minatsu; and The ephemerally beautiful yet complicated treasurer Shiina Mafuyu. While every day since then has been non-stop fun, Graduation Day now looms near. Could this spell the end of their carefree days? (Source: translated and adapted from official site by Cranston)

Struggling yet brilliant 19-year-old Minato Sahashi has failed his college entrance exams for the second time, resulting in him being regarded as worthless by those around him. However, the course of his seemingly bleak future is altered dramatically when a beautiful, supernatural woman falls from the sky and into his life. That woman, Musubi, is a unique being known as a Sekirei, a humanoid extraterrestrial with extraordinary abilities. These aliens are known for kissing humans carrying the Ashikabi gene in order to awaken additional latent powers deep within. Recognizing the potential within the seemingly insignificant youth, Musubi kisses the bewildered Minato, initiating a bond between the two of them. This drags him into the high-stakes world of the Sekirei, where he and his new partner must compete against others in a battle for survival called the Sekirei Plan. However, unbeknownst to the contestants, there is far more at risk that what the competition initially entailed.

Kusano's first errand - A ten minute OVA that came along with the 6th vol. limited edition of Sekirei. Kusano finally tires of nobody admitting her as Sahashi's potential wife, so she insists on joining Musubi and Tsukiumi on their shopping race to show her abilities. An iffy day ensues.