Main plot is not bad, time travel of high school students to Warring period.

But ....

I can't stand anymore and have to stop around final.

Fighting wise, it's crappy. Fight the samurai soldier who will kill you without batting an eye with just punching, without killing them?

Worst thing is when fighting seriously and when one of the friends got wounded and near dead ..... there it comes ... other one are talking sadly to wounded friend and .. where is the enemy that try to kill you? ... did he just watch silently because you're sad?
Oh .... I really can't stand scene like that. Have to drop before finish.

If directing is better, it'll be really interesting movie.