--"A certain event" has become a world where the more otaku you are, the stronger you become. In that world, the otaku of Akihabara became stronger than the [strongest existence] weapons, and the hegemony of the world depended on the otaku. A brave boy stands up to take back the original world from such a world.... The main character, Korosuke, and his companions aim to retake Akihabara from this strange world! [Battle introduction] A completely new form of card battle that has never existed before! ! ! ! Its name is [Inflation Gimmick Card Battle] Strengthen the [Mana] that holds the key to victory! With up to 7 mana dealt per turn, you can win in one shot by inflating the mana!! Find your own deadly strategy!! The fate of victory or defeat is up to you... Spin your brain to the fullest and awaken the otaku!! Training mode! Live a daily life as an otaku and nurture otaku. Let's make the battle advantageous by strengthening the otaku. ◇ Compete in battle! Rank Battle to Raise Ota Rank Defeat players from all over the country and raise your rank! Aim to be the strongest Otasa! As your rank goes up, you will get rewards! ◇Fight freely! Free battle When you want to test your skills casually, go here. Play freely and check the strength of your deck! ◇ Compete with your friends! Friend Battle You can play against your friends! Aim to be the strongest Otasa! !