I'm an Ordinary Returning Student at the Academy - Chapter Side Story 1

An ordinary man, Ye Chen traveled to the cultivation world by accident and became a phenomenal immortal of that era. After 3,000 years in the cultivation world, he was betrayed and traveled back to earth through a spatial tear.Five years had passed in the mortal world, but when he came back with his abilities, he found out he now has a daughter!

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

Humanity has endured for millions of years, but recorded history only spans a mere four thousand years. During that unrecorded deep-sea age, what exactly were we doing?Countless indescribable beings ruled the universe, and our powerful ancestors preserved the fire of human civilization under their threat.Then they disappeared, and we rose.Now, they are coming back, mysterious psychic powers are awakening, the flame of human civilization is slowly extinguishing, and no kings are in sight...Chen Ke opens his eyes to see a world full of ruins and himself on the brink of death.The moment his heart was pierced by the Blasphemous Dagger, he became a dying man without a heart.Able to survive only 2 hours...