OVA
Description
Midori Chitose is a central character defined by a tale of two lovers from a past life, whose forbidden love led to a promise to reunite in another life. This past-life connection forms the core of her identity and motivations, as she believes herself to be the reincarnation of the girl from that story and sees Yuusuke Takazaki as the reincarnation of her past lover.

She possesses an outgoing, cheerful, and carefree personality, radiating high energy and expressing her thoughts with straightforward clarity. Her unwavering optimism extends to all her interactions; she shows no prejudice toward male students and is the only female character who willingly engages with the perverted but well-intentioned Baka Trio, considering them Yuusuke's friends. Despite her seemingly simple and deredere demeanor, she is highly intelligent and perceptive, often understanding more than she reveals.

Her primary motivation is a profound love for Yuusuke and a powerful desire to reunite with him. She exhibits single-target sexuality, focused entirely on him, and is willing to do anything to please him, including complying with unusual or perverted requests from his friends. A notable aspect of her behavior is her inability to grasp the social implications of her affectionate but often inappropriate actions, such as climbing on top of a bedridden Yuusuke while wearing lingerie or persistently clinging to his arm. She operates within her own worldview, interpreting his initial rejections as a temporary failure to remember their shared past rather than genuine disinterest.

Physically, she stands approximately 158 cm tall, with light brown short hair and green, tareme-shaped eyes. Her D-cup breasts are frequently noted among her attributes.

Her story arc revolves around rekindling her past-life relationship with Yuusuke, who initially remembers nothing of their previous connection. This creates a central mystery and narrative drive. The resolution involves significant sacrifice: she uses her life force to save Yuusuke's life. To preserve her own, she must return to the 31st century, an act that erases everyone's memories of her existence except for Yuusuke's.

In the OVA "Erolutions," set several months later, her role evolves. Having returned to the future, she can only interact through dreams. In this capacity, she acts as a matchmaker, energetically and erotically encouraging Yuusuke and Futaba Kutsuki to acknowledge their feelings and consummate their relationship. This demonstrates a mature acceptance that Yuusuke's happiness lies with Futaba, leading her to ultimately encourage their union.

Within the original visual novel, her role differs. The concept of past-life lovers, central to the anime, was an adaptation addition and is absent in the game. There, she is simply a girl who arrives at the academy and seems to know much about Yuusuke without his prior knowledge of her. She encourages a mysterious young girl named Ko-Midori to stay in Yuusuke's room.