I Tame Monsters and Monster Girls, and Zagi, the Campus Beauty, Pursues Me

This is a world teeming with monsters. To fight them, some people awaken the power of tokusatsu: some become Sentai warriors, some can summon armor, and others can transform into Kamen Riders or Ultramen.

Wu Zejun awakens as an Onifil, a being who doesn't exist in the Ultraman universe, and gains the ability to switch between multiple forms. On top of that, he is bound to the Capture System. Whenever he defeats a monster or a villain, there's a chance he can turn it into a monster girl or villain girl. They can help him in battle and boost his own stats.

Water Girl: Please give me your orders, Master!

Baton Girl: You're the best, Master! I love you most of all!

Rose Woman: Hehe, Master, you're so interesting.

Gatanothor Girl: Master, you're so strong!

Medusa Girl: I'm willing to serve you, Master!

Not long after the new semester begins, he accidentally bumps into the campus belle and ends up being pursued by her. To his surprise, she's Zagi's host. From then on, the two share a remarkable connection.