Gone ~Sugisarishi Hibi~

Yuji Takeda is an unpopular actor who can not sell. During the shooting of a historical drama, he is struck by lightning and he find himself in a parallel world similar to the drama that was shot - Sengoku period full of ninja and samurai.

[From vndbreview]

Our guy dreams of being an action star some day. While filming at a remote location, he got hit by lightning that sent him to a different world. There, he happen on a girl chase by some ninja. If he decide to fight and stay, he can help out some girls. Otherwise if he run back to the present, he will bring back a surprise or two.

[From Li's Fun House]