This is often spelled out clearly, that this 16 year old boy looks like a 12 year old.
Nearly all shounen-ai anime has the same issues and problems, thanks to their reliance on tropes.
Fortunately—or perhaps unfortunately for Keita—his sisters aren't the only women lusting after him, and there's no telling when the allure of temptation will get the better of the boy as well.
With the return of an old enemy, as well as the appearance of two new, Holy Sword-wielding beauties, it isn't long before Issei and his Devil comrades are plunged into a twisted plot once more.
I watched these episodes so long back.
In reality, he opts for the two-dimensional world of gaming over real life because he is an unhealthily obsessed otaku of galge games a type of Japanese video game centered on interactions with attractive girls.
Description: He is biologically a boy but looks completely like a cute girl.