Real Onigokko: Seven Rules

Ren Kunieda lives with his mother in poverty, and her only purpose in life is to draw pictures. Then she receives an invitation to participate in the "Real Tag". The prize money is 500 million.
In order to escape from his current life, Ren happily heads for the amusement park, but what awaits him is a game of desperation in which he will die if he is "touched" by seven ogres!　
Can he escape from the ogres' "rules" together with the innocent Nana, who wears bear ears, and Asaba, who is a keen observer?