Gal Game Master Shiina

is a Japanese light novel series written by Suo Tsukasa, with illustrations by Nao Saeki. The series began publication on April 10, 2010 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Gal game, that's life. The person who masters all of them grasps the world law (game system), sees through all the options, never hesitates, and rescues the princesses (heroines) trapped in the story (full comp).

This great power was bestowed on a boy. The boy's name is Yusuke Shiina. Another name is "Gal Game Master Shiina". When the power to sleep blooms, the "promised ending" and "opening" will come to the entire universe.

There is a senior with an infant figure who lifts up and carries his destiny on his own, but what should I do?