Tsuki wa Higashi ni Hi wa Nishi ni: Operation Sanctuary OVA

After the tragic loss of his parents, Naoki Kazumi finds solace in living with his cousin, Matsuri Shibugaki. His life takes an unexpected turn when a girl named Mikoto Amagasaki unexpectedly drops onto the school rooftop. Hailing from a century ahead, Mikoto has traveled back in time with a singular mission: to locate her long-lost brother. However, upon meeting Naoki, she mistakenly believes he is the sibling she seeks.

As Naoki navigates his new reality, he becomes entwined in Mikoto's quest, leading to a series of comedic and heartfelt moments. With the backdrop of time travel, this tale explores the bonds of family, the complexities of relationships, and the challenges of facing the past while hoping for a brighter future.