Rescued from nearly drowning in a river, a young Chidori yearns to pay back her savior's kindness. Though her cute and innocent appearance might not show it, she is actually a highly skilled ninja, so years later, Chidori and her friend Sukezou come to serve under the man who saved her—the ambitious warlord, Nobunaga Oda. As Nobunaga fights off invading forces and sets his sights upon neighboring lands, Chidori is assigned vital tasks to assure victory, such as gathering information or assassinating key figures. Between taking on these important missions and dealing with the colorful cast of Nobunaga's family and servants, the young ninja is always ready to do her best to lead her master toward greatness. [Written by MAL Rewrite]

Recap of Sword Art Online: Alicization - War of Underworld.

Yuno Gasai lives a normal life as a first-year in high school. She gets along well with her parents and even has a small circle of friends. However, she cannot help but feel as if someone is missing from her life, someone so important to her that it was as if she had lived another life trying desperately to stay with them. After a class trip to the beach, Yuno returns home; but in the middle of the night, she receives strange messages from a voice only she can hear. The voice informs her of the person she is desperate to meet and that she must find him. Soon, she finds herself in a mysterious realm, her only goal being reunited with the person she cannot remember. Though obstacles stand in her way, Yuno will stop at nothing to meet her beloved once again. [Written by MAL Rewrite]

Recap of the first 18 episodes of Sword Art Online: Alicization.