Baka to Test to Shoukanjuu‎ - Volume 5, The Second Question

The human race is fending off the assault of the thaids, strange monsters evolved by animals occupying most of the earth's surface.

Because of the monsters, society has evolved into one based on individual fighting prowess; Erik is an abandoned young boy living in such society with the most useless of the powers.

Everything changes when his father returns home, bringing something he would have never expected.

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After successfully completing the tasks of the B-Class World, Lu Yue finally succeeded in entering the A-Class world.

What? The blackening value of the males in the A-class world is above 80!!

Lu Yue: What are you afraid of? Calm down!

This is a story of a drama king and a black-bellied male.

First World: Mafia’s Pet Lover
Second World: Revenge of the Reborn Boyfriend
Third World: Emperor is a Ladies’ Man…

- Description from Novelupdates

Ryoma Kogure, a high school student, is surprised when his childhood friend and best friend, Hirasawa Reo, who has always been popular yet indifferent to romance, suddenly confides in him about a love matter.However, when Ryouma learns that Reo’s crush is their quiet classmate, Otsuki Shizuku, he decides to help him out.While personally gathering information on Shizuku for his best friend, Ryoma is unexpectedly summoned by the school’s most beautiful girl, Asahina Alisa!She, being Shizuku’s best friend, mistakenly believes that Ryouma has feelings for Shizuku…!?Caught in Alisa’s misunderstanding, Ryoma scrambles to sort things out…As they began supporting their best friends for their own reason, Ryoma and Alisa grow closer——A romantic comedy that starts with friends supporting each other’s love!

God plucked one of his creations from his first Earth and gave him a second chance in another one of his Earths...surprise it is in DxD! Now reincarnated as a perverted side character how will our poor protagonist handle his new identity? Well he probably wont make the choices you will want him to, that's for sure!