Summer Wars

High school student Kenji Koiso is an honest and introverted math genius. One summer day, he was invited to work in the hometown of his beautiful senior sister, Jinnai Natsuki. It turns out that the part-time job involves pretending to be Natsuki's boyfriend. The ancestors of the Jinnai family were once a samurai family that fought fierce battles with the Tokugawa legions. Hundreds of years later, the strong and tenacious character is still deeply rooted in the soul of this family. After the initial restraint, Kenji gradually integrated into this lively family. In the world at that time, an online virtual platform called "OZ" was popular all over the world, and 1.6 billion people were fascinated by it. It has what is known as the most secure defense system in the world, but its login password was accidentally cracked by Kenji. A mysterious hacker invades OZ, and the virtual network and real society suddenly fall into chaos. At the critical moment, the Jinuchi family regained the responsibility and honor of the samurai family and launched an intense summer battle with the destroyer A.I....