*This guide contains light spoilers for inKONBINI: One Store. Many Stories.
After opening in inKONBINI on the second day, a tall stranger who doesn’t talk will enter and wander around. Part of helping this customer includes a guessing game to figure out what they want, which can be a little hard, given that neither of the products they want is actually want are on the floor, and they give a vague idea that could be a range of products (the person refuses to speak and just nods in the affirmative or negative). This doesn’t really matter overall, which I only note because it feels like it will. Instead, a trophy can be earned at checkout, but requires some setup.
First, when you arrive, before even opening the door, you might want to wander around and see if anything needs doing. In front of the store, you will see that the Special Offer Display section (with a lot of signage to help it stand out) is empty. Examine it, and you will see a note that the store is getting a shipment of Harajuku Soda and Zen Leaf Matcha, so the current stock is set to be discounted to make room.

There is a stock of both items in the back room, so you can head back there and grab them. One container of matcha fills one row, while Harajuku Soda can fit two cans in a row. There really is no right answer to stocking; make it look as pretty as you want, and you are done. Personally, I like to complete these tasks before I even open; however, time will not progress when the man stops and needs help, so you can complete these then.
Once the Mysterious man is done, he will head to the counter, and Makoto, before she even starts to ring him up, will have the option to try to sell the items on display. To complete this, you need to sell both the Zen Leaf and Harajuku to him before ringing the man up. The good news, getting the wrong answer will not bar you from trying again.

On the Zen Leaf Matcha, tell the man, ‘You can’t miss this special offer.’ to get him to purchase the tea, and ask, ‘Ever been to Harajuku?’ to get him to buy the soda. As a former GameStop employee, this brought back painful power-up rewards flashbacks for me. You will be able to tell that they agree the same way I could back then, too, with an audible sigh. But upon doing both, the Too Good To Pass Up Trophy/Achievement will pop, and you can return to collecting capsu… I mean, working! That’s it, working!
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