Tsugumi is a mystery. At first glance, she's wary, cold-hearted, and rarely speaks at length. She seems to be hiding something from the others. She is also initially quite distrustful of the rest of the group.    ~!It's revealed that Tsugumi is a carrier of the Cure Virus, a rare genetic virus that enhances the body, stops its aging after five years, and has great curing power, being able to heal severe injuries in minutes and rendering her immune to nearly all diseases. She was kept as a test subject by Leiblich for eight years until she eventually escaped. Due to the fact that having cells that never "age" makes mutations very dangerous, she is often wearing a giant lemur suit when out in the sun to protect her from UV radiations. !~ (Source: Wikipedia) 

Ever17 is the tale of seven individuals who come to be trapped within the underwater marine theme park, LeMU, 51 meters below the surface. During an apparently normal day at the park, an incident occurs, placing almost half of the facility underwater. The path to the surface and the communication lines are cut off. In addition, LeMU is under constant assault by severe water pressure, limiting time to find a means of escape to 119 hours. Escape is not the only concern, however; many questions arise as to the legitimacy of the accident and whether or not those trapped there were brought there for a purpose.<br>
As the situation grows more desperate, the people trapped inside LeMU grow closer. They begin to uncover the answers to mysteries about themselves, LeMU, and the situation itself. As the end of LeMU grows nearer, the mysteries and relationships forged by the situation grow deeper. Ultimately, it is up to the characters not only to survive, but to discover the truth behind LeMU and themselves as well.<br>
(Source: Wikipedia)

A collection of short stories based on the visual novel Ever 17 -the out of infinity-

Tsugumi Komachi