I’m Invincible, But All I Want Is a Laid-Back Life in Demon Slayer

[Everyone's favorite + female-oriented + lighthearted daily life + slow-paced + no fixed pairing in the main story + author favors the heroine + feel-good redemption story + does not break up Obanai and Mitsuri or Sanemi and Kanae]

After a mistake, Qing Ling and the System accidentally transmigrated into the world of Demon Slayer. She had planned to take it easy, but unexpectedly met a sweet little Yoriichi who was practically falling into her lap. With what little conscience she had, Qing Ling took him in and cared for him. (System: Isn't he the one looking after you? Irresponsible adult, take responsibility, damn it!)

The story includes Yoriichi, Uta, Kokushibo, Muzan's fake third-party romance, young Doma, Gyutaro, and more.

The System's opinions of everyone (the author got embarrassed writing these):

System (about Yoriichi): Why are you always staring at Qing Ling? I don't approve of old people falling in love!!!

System (about Uta): Damn it, I hate people who win others over without even realizing it. Don't let that devious woman get to you.

System (about Muzan): Oh my, the Demon King really will do anything for news of the Blue Spider Lily. How spicy.

System (about Doma): Hello? Handsome, back to sneak into her bed again? You see her every day, and you still haven't reflected on yourself?

System (about Kokushibo): You seem a bit like a lonely, melancholy widower. Qing Ling, don't let that passionate persona turn your head.

Qing Ling: ...Do you really want to make me lose face that badly?

In short, it's the story of a half-good, half-evil, go-with-the-flow chaotic heroine and a cruel, obliviously self-serving System in the world of Demon Slayer. The cover features Qing Ling. The human and the System bicker every day. Neither Qing Ling nor the System is completely good. Though everyone is drawn to her, love at first sight is rare.