Reika Hayami and the Uninvited Guest - S1-E5
Stupidity: A rather unnecessary part of the plot focuses on the convict trying to learn Reika's last name by ordering something on her behalf to read the name on the bill. That's absurd; he couldn't possibly know if the bill would just have the number of the cabin on it instead, or the production company's, and quite frankly for such a VIP (the cruise itself was a one-evening trip around the bay just so fans could spend time with their idol Reika, and he knew that) the ship wouldn't even charge anything for a drink brought to her room.