Welcome to Wac. Tanaka is reluctant to visit WcDonalds with Ohta until he realises they are offering robot vacuums as a free giveaway, but becomes depressed after they run out. He orders a milkshake but cannot muster the effort needed to suck it up the straw. Meanwhile the waitress, intimidated by Tanaka’s listless stare, is further intimidated by Ohta’s naturally terrifying aura, only to be surprised when they politely thank her. They visit again the next day but Ohta leaves to fetch his forgotten phone. Tanaka is spotted by his sister and her nervous friend Saya. Rino is happy she can spend time with Tanaka in public without Ohta. Saya reveals she has an older brother who is much larger and more gorilla-like than Tanaka, but she prefers Tanaka for his “dark prince” looks. The waitress is further intimidated after meeting Rino, believing she is a Tanaka clone. Ohta returns and it turns out he is Saya’s brother. Saya wonders at the coincidence of being friends with everyone’s siblings, while Rino is irritated at seeing Ohta again. After everyone returns home Ohta notices Saya is unusually happy, while Tanaka has a full stomach from WcDonalds, causing Rino to blame Ohta for her missing out on having dinner alone with Tanaka.