Riaru Onigokko

Alternative Title: Riaru raifu de renai o kaijo suru tame ni Gacha shisutemu o tsukatte the story of Naoya the biggest otaku, also a high school student who has always been unlucky in love. He's the only single guy in his class and he's convinced he'll never get a girlfriend. That is until he receives a mail from a gacha game on his phone that allows him to collect and summon virtual characters through a gacha system. What he doesn't realize is that these characters come to life in the real world.