A collection of short stories depicting the loose and silly daily lives of a genius but perverted older brother and his 8th grade younger sister, that has author muttering in spite of himself, "Why am I drawing this kind of manga?"

An older brother, who is hopelessly infatuated with his younger sister, has the talent of a genius scientist, even though he is only a high school student. He makes full use of his abilities, creating self-serving inventions and inflicting them upon his sister as a prank! But, in fact, the younger sister is also...?

(Source: Futabasha, translated)

Included one-shots: Sukitooru, Kaitou Pierre, One Day