I love Transmigration the most.

Summary

In the dead of night, Kobayashi and knight Ku Lei Ya fend off an invasion by the Demon King's army in the capital. After successfully repelling the attack, they return to find Princess Airi waiting anxiously. Airi expresses guilt for involving Kobayashi in danger, but he reassures her of his strength and agrees to stay longer, establishing a brotherly bond. Ku Lei Ya, initially skeptical of Kobayashi, becomes impressed by his abilities after seeing his adventurer card, revealing him as a Grand Mage. The next day, Kobayashi exercises in the courtyard, showcasing his strength, and continues to bond with Airi, who admires him. They spend time together, but Kobayashi struggles with games against Airi. He conducts experiments to create magic circles and seeks jewelry to inscribe incantations, hoping to develop new magical items. He also observes the princess's education and suggests breaks to improve focus, introducing her to milk tea, which becomes a hit with the princess and her tutor, Lady Magician Lei Yin.

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