OVA
Description
Miki Sawanaga, born May 29, possesses brown short hair, amber eyes, a height of 161-161.9 cm, a weight of 50-50.4 kg, and measurements of 86-57-80 cm.

Her family situation is complex. Recognized as Mr. Sawanaga's daughter, she is biologically the child of Ayumu Inou. Her mother is Mrs. Sawanaga. She has a younger brother, Taisuke Sawanaga. Her extensive paternal family includes aunts Kagura Inou, Youko Saionji, and Moeka Sekihata, plus half-uncles and half-aunts like Shun Hazama and Wakaba Nijou. This makes her the biological half-niece of Kei Ogata, a connection initially unknown to both.

At Aoi School, she joined the basketball team, exhibiting a lively, tomboyish personality that garnered popularity among female students. Midori Nagawa was her best friend, while she shared a contentious relationship with classmate Ryouka Yuuki. Frequently caring for Taisuke when their parents were away, she often occupied him with video games. She developed feelings for former classmate Kei Ogata, occasionally revealing a more feminine side, such as walking with him in the school flowerbed and sending him pressed flowers.

Within the visual novel, her romantic paths with Kei diverge. One route reveals Midori as her first love, implying bisexuality. Canonically, she and Kei maintain a long-term relationship for seven years, resulting in a child together, a fact established by an "adultery chart" in the series lore.

The OVA presents a different narrative. During a summer festival, Kei leads Miki to a secluded spot and rapes her. She remains home for several days afterward. Returning to school, she hears his apology but conditions forgiveness on him ensuring Midori's happiness. Learning Midori plans to move away and discovering Kei's deception involving his online alias "A.W.," Miki slaps him, calls him a coward, and departs.

In *PureMail After*, Miki and Kei have been together for seven years but face relationship strain. During an argument at her home, Kei mistakes Taisuke for Miki and rapes her brother. Later, within the *School Days* continuity, Taisuke frequently references Miki, noting her job as a gym teacher and displaying behavior others label a "sister complex."

Her name combines "beautiful" (美) and "era" (紀) for her given name, with "swamp" (澤) and "eternal" (永) forming her surname.