World's Strongest Oneesan

PERMISSIONS ∙ APP ∙ CR ∙ REGAINS ∙ GAME ∙ PLAYER

A 20 year old woman who lives in the city of recolle, with a passion for gaming and military history but not much else. During the founder's day festival, she receives a mysterious app on her phone by the name of retrospec, an unwelcome addon she soon discovers she isn't alone in receiving. It isn't long before her reclusive lifestyle undergoes a sudden upheaval...