The villain's side of the novel - Chapter 141 After A Month (1)

After coming out of a tunnel… it was pitch dark.

Douluo Continent, Star Luo Empire, Star Luo City.In the finals of the All-Continent Advanced Soul Master Academy Soul Dueling Competition, Liu Xing looked coldly at Shrek Academy's last hope on the opposite side and said, “Huo Yuhao, Wang Dong, surrender now, and no one will get hurt.”High above Shrek City, Liu Xing stared at the Radiant Holy Dragon soaring into the sky and said in a deep voice, “Ten thousand years of Shrek, today you will be erased.”Facing the Sea God Tang San, who had illegally descended to the lower realm, Liu Xing's voice was like a chilling wind, icy and bone-piercing: “Sea God Tang San, you have violated the law and recklessly interfered with the lower realm. You are courting death.”Hearing this, Tang San was momentarily stunned. Why did these words sound so familiar?••••There is only one single female lead for now but there are many female characters who will have feelings for mc.••••

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

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.