2.229 out of 5 from 132 votes
Takane is excited; his mother has promised him a brand new bike if he places in the top one hundred on his upcoming exam, and he's certain he'll pull it off. But when Takane discovers that he has placed poorly, he lies to his mother and incurs the wrath of his little sister. Frustrated and angry, Takane later makes his way to a shrine where he comes across a mysterious man with a tempting offer: in exchange for a good test score, Takane must simply give up something that he has no use for – his sister...
When her mother died in childbirth, Naho became not only a sister, but a new mother to her baby brother Jun. While Naho would rather be out with her friends, talking about boys and having a good time, she often is shouldered with the responsibility of looking after Jun instead. A part of Naho would love for Jun to be gone forever; and when the dream sphere dealer Kotarou shows up at her door, Naho might finally get her wish...
Strange Story of a Sphere Dealer and Takane no Jitensha could have been carved from the same mold. Each involves a young person who gets in over their head when they offer up their sibling in exchange for a fleeting desire - and each tries their best to do whatever it takes to reverse their decision.