MTL - Naruto Lineage Theory? Trash - Chapter 666

When The Cute Kunoichis Spied on Their Teacher's Secret is a light novel written by Kazuma Kamachi and illustrated by Ryuushi Tajima.

The story takes place in a world where Japan never ended their isolationist phase, and agents from foreign powers are always threatening to steal the country's advanced technology. In order to combat this threat there has been a resurgence of ninjas that use Strategic Martial Arts, techniques that combine cutting-edge modern technology with a traditional foundation of martial arts and ninjutsu. The story follows Souha Sugiyado, a 17-year old ninja instructor and former ninja prodigy who was forced to retire from active duty by the wounds he suffered in his last mission. Souha's four students are all kunoichi who have all gained the rank of Elite Ninja, the highest official rank available to ninja. However, one day two Shogunate ninja approach him with the news that his four students have gone rogue and have stolen a portable modular nuclear reactor, and thus they ask for his help in bringing his students to justice.

The protagonist fell asleep while playing an online game. However, he awoke in a strange world with his game character’s appearance. In a state of shock, he noticed that he was equipped with nothing but his strongest weapon and armor. To make matters worse, our hero’s appearance was changed by the special avatar skin『Skeleton』when he entered this new world. The protagonist wanted to live without drawing attention, but he got acquainted with the dark elf Ariana and received her request.

An absurd death at the peak of his career drags Dravin to a parallel world, where he is transmigrated into the body of a man with the same name and face as his own.He used to read webnovels about dragon reincarnation. So he never expects that in this new world, all he has to do is just be himself.Sounds like a dream, right? A second chance at life just for being yourself.But no, not quite. He has to cook delicious meals and serve them to humans possessed by demons.On top of that, Dravin must raise the Pleasure Index of a new world isolated from entertainment so they can be immune to demon attacks.Cooking is his passion, being a chef influencer is his job.Now, hunting demons would be his nightmare come true, or... could it be a wonderful dream, too?***[Chef, please unlock the secret recipe for a broken heart from a cheating partner]“Huh, it seems like curry noodles? Wait... what is this serenity capsule ingredient?”[That's from the tears of Asmodeus, the demon of lust and anger.]“What? How to get that?”[By not having lustful thoughts for 33 days.]“...”

Chu Yunsheng’s head hurts every time he wakes up. Because he is usually either lying in the villain’s bed, or had just gotten up from the villain’s bed.

The reason why villains are called villains is because they are extremely lethal and vengeful… and they love to blacken…

Villain: Bastard, I will castrate you!

Chu Yunsheng: …Oh.

- Description from Novelupdates