Surviving with an SSS-Rank Inventory

‘One day, I became a ‘Storage Character’ within a game!’
A no-life gamer with seven max-level characters is stuck within the highest-difficulty Virtual Reality game.
Unfortunately for him, he just had to get stuck when he was on his level 10 ‘Storage Character’.
It might be a shabby start to his new life, but at least he can take comfort in his abundance of items, right?