Yatogame-chan Kansatsu Nikki

Jin's sister, Toshika, has come to an udon restaurant for lunch. Inside she spots Yatogame and a girl that she assumes is one of her minions. Part of their conversation that she overhears involves the words "scum" and "kill"?! Terrified, Toshika runs out of the restaurant and tries a Chinese place instead... but once again, she runs into Yatogame and her minion! are there illegal substances in the chilled Chinese noodles?! This is getting scary...