First Impressions: Btooom!

Ryota Sakamoto is a 22 year old NEET who lives with his mother. Despite his mundane life, he’s one of the best players in the world at the online game Btooom! One day, he wakes up on a tropical island with no recollection of how he got there. However, it turns out that a real life version of Btooom! is taking place on the island and Ryota will have to survive against the other contestants if he wants to find out how he got there and escape.