Days of Memories 2 ~Boku no Ichiban Taisetsu na Kimi e~ (Days of Memories 2 〜僕の一番大切な君へ〜, which translates as "To You, the Most Important to Me") is the second chapter of a series of dating sims created by SNK Playmore for cellphones. It was later ported to the Nintendo DS, in a bundle along with the first and third chapters. The games feature various female characters from SNK as datable girls.
Metal Slug references
In the second game, Fio Germi appears as one of the datable girls. Here, she is a energetic girl who attends the same class as the protagonist character.
All images courtesy of Hardcore Gaming 101