On the island of Hatsunejima, where spring is eternal, grows a particular large cherry blossom tree. This cherry blossom tree never withers, and is said to be able to fulfill any wish. However, one day, this tree had become a normal cherry blossom tree...

From crashing his bike to falling in lakes, Seina Yamada just cannot shake the bad luck that follows him. But his fortune begins to change when he is forcibly recruited into the Galaxy Police and ends up capturing the most pirates in the force. Now, Seina is no longer just the unfortunate boy from Earth; he is a man that pirates have come to fear. Despite his reputation, Seina is still the same clumsy guy, but at least he has Amane Kaunaq, a former model, and Kiriko Masaki, his long time friend, to keep him together. With their help, Seina sets out on an adventure in the hopes of becoming a great Galaxy Police Officer. [Written by MAL Rewrite]

Six thousand years ago, mankind's glorious reign ended as a result of an invasion of the demon race, brought about by the emergence of 72 demon gods. To safeguard the remnants of humanity, the Alliance of Temples appeared to stop the demons' progress and temporarily stabilize the situation. At present, nine-year-old Long Hao Chen is training to become a part of the Knight Temple Hall. Through sheer dedication and the support of his companions, he passes the knight exam. Now, under the tutelage of his teacher Long Xing Yu, Long Hao Chen endures the Holy Resurrection Ritual to ascertain his capability. The ritual reveals that Long Hao Chen is a Son of Light—an individual who possesses a vast amount of spiritual energy. Recognizing his disciple's promising potential, Long Xing Yu urges Long Hao Chen to become a strong knight capable of defeating the Demon Lord alongside him. With countless challenges awaiting him, Long Hao Chen may be the warrior that can end the era of darkness.

takes place during a sweltering midsummer day when Ozu, the protagonist's "terrible friend," accidentally drowns the only remote control for the air conditioning unit in their apartment. While they discuss their predicament with Akashi, the protagonist's raven-haired love interest, a sloppily-dressed time-travelling student arrives from 25 years in the future, prompting the protagonist to borrow his time machine in an effort to snatch the remote control from the past before it breaks.