I Was in Another World Before I Knew It, but I Think I Can Handle It Because I Have Item Box With Transcendent Feature

On my way home from work, I stopped by a convenience store, bought some bento, and thought I’d finally arrived home. The standard explanatory character didn’t appear. Thanks to that, I don’t even know why I’m in this situation. It’s so unreasonable. That’s right, the liquor and toys I ordered online were supposed to arrive today!　They should have been in the delivery box I was reaching for! I yelled, then a strange board appeared in front of me. Item box? Delivery box? An online store? What the hell is this? Anyway, can I do something with this? That’s what I thought, but then I was confronted with a shocking fact. [Resale prohibited!] Well, it looks like there are still some ways to do it. I’ll just have to use this item box to live in this world.