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Shikatori Natsuki traveled to the world of death and became the younger brother of the first captain, Shikatori Baunsai. He thought he had thighs to hug, but found that Shikatori Baunsai was terminally ill and had only a few years to live. Fortunately, he has awakened the teacher system and can become stronger as long as he teaches. In order to have the strength to gain a foothold in this world, Shikatori Natsuki became a teacher at the Spiritual Arts Academy, inherited the Shikatori Dojo, and worked hard to teach and mentor students. [Rokukaru Kensai completed the swordsmanship training under your guidance and received the reward - Sword Skills·Red Tide] [Aizen Sosuke completed the ghost way training under your guidance and received the reward - Podo no 90·Black Coffin] [Kurosaki Ichigo's strength greatly improved under your guidance and received the reward - Holy Text: D] Many years later, Aizen Sosuke Suddenly came to the door: "The vacancy period of the Heavenly Throne has lasted for too long. Please ask the teacher to end the unbearable vacancy period!" "From now on, the teacher will stand at the top!" --- (This book is also known as: "I Teach Kendo in Soul Society", "Disciples Take Me to the Soul King's Palace", "Become the Lord of the Four Realms from Teaching Kendo")