Torimonogatari

"I think a world full of fakes like this should just disappear, big brother." Tsukihi Araragi has gone missing, she managed to slip past Izuko Gaen's surveillance. The “Phoenix” assassination order is reignited! Yozuru Kagenui, who is scrambling to find Tsukihi, is teamed up with popular manga artist Nadeko Sengoku—!? This is truly a modern-day oddity! Oddity! Oddity! (Source: Kodansha, translated)