Kajii Yuu

Time is Taisho. The sound that the other person's true heart can be seen by the color of the voice. Her encounter, which has been disliked by people because of her ability, was imprisoned for the charges of atonement and turned into a boy with rejuvenating drugs. Knowing that the two people who couldn't believe in people in each situation believe in people for the first time …!?

In this world, when people turn 15, they are granted a skill from the heavens. Hirak Mattoh was born into a family of Sword Saints and was hailed as a prodigy from a young age. Everyone was certain he would inherit the same title. However, at his skill appraisal ceremony, he received Unlocker — a seemingly worthless ability that could only "open what is closed." Disappointed, his family branded it a trash skill and exiles him. Left adrift, Hirak soon discovered its true power. By unlocking his status window, he could freely acquire skills, obtain item drops, and grow stronger without limit.