DogLickerGods
What's the side plot Eiji detected? The one with a pink-haired gyaru. Cause I like the sound of that. The only thing that comes to mind is Masamune-kun Revenge, but I dont think it's that? Though if you're adding non-supernatural series, Oregairu would be nice. Tons of cute girls, and the protagonist might be an entertaining subject. Probably an SI substituting the mc.