How Could a Kind Soul Have Regrets?

[The cover was drawn by my little sister, who's still in elementary school~] (proudly standing with hands on hips)

He'll say, "Hello."

He'll say, "Are you okay?"

He'll say, "Watch out! Hide behind me."

He'll say, "It's okay."

He'll say, "You can leave all your troubles to me."

He'll say, "I have no regrets in this life."

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The Guardian Spirit Isn't a Cursed Spirit (Story One) [Jujutsu Kaisen: The Golden Age of Sorcery, a Thousand Years Ago]

They say, "Your Highness, you're mistaken."

They say, "Your Highness, I'll help you one last time."

And with that, the prince lost the ability to see them.

[Related characters: The Emperor, Tengen]

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The Demon Slayer Is Very "Fragile" (Story Two) [Demon Slayer: Taisho Era]

He says, "Get back. Don't push yourself!"

He says, "I know it sounds awful, but I'm really glad I met you all."

And then everyone refused to let him die.

[Related characters: Kagaya Ubuyashiki, Muzan Kibutsuji]

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The Teacher Has No Superpowers (Story Three) [Bungo Stray Dogs: Before the Early Story (Original Headcanon)]

He says, "It's all right. You can be a little more selfish."

He says, "...I'm going with you. It's too dangerous."

He says, "Get some rest. When you wake up, everything will be different."

And different it was. The teacher took care of everything, including himself.

[Related character: Mori Ogai (as a boy and young man)]

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Tsurusaki Can See (Story Four) [Jujutsu Kaisen: Between the Main Story and Volume 0]

He says, "It's okay. It's not your fault."

He says, "Those people will get what they deserve."

That man gently lifted them out of the darkness.

[Related characters: Yuta Okkotsu, Junpei Yoshino]

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The Zenin Clan's Unusual Divine Child (Story Five) [Jujutsu Kaisen: Before Volume 0 (Original Headcanon)]

He says, "Clan Head, that Heavenly Restriction will never serve your interests."

He says, "Big brother, if you're leaving, then hurry up and go."

[Related character: Toji Zenin]

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(Story continues during the Star Plasma Vessel arc)

He says, "Your Six Eyes are beautiful."

He says, "Make sure you keep smiling."

He says, "Big brother, am I in your way? Do you want to kill me?"

[Related characters: Satoru Gojo, Suguru Geto, Toji Fushiguro]

Afterward, an old friend's grave lay empty, and a familiar stranger had gained a stitched-up line on his head.

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(A Detective Conan story to be added later)

Theme: Treat others with kindness