I Am in the Tiga Victory Team, and I Look Like Melba at the Beginning.

[Ultra fan + monster girlization + picture book collection and development + welfare girl + contrasting cuteness] Su Yu traveled through the world of Tiga and became the youngest biological special consultant of TPC. At the same time, he awakened the [Monster Transformation and Containment Illustration] - as long as the monster is defeated to the point of death, it can be forcibly transformed into a girl, a master-slave contract can be concluded, and it can be permanently contained! While Dagu was still practicing his light skills, Su Yu had already transformed Golzan into a hot lady, Melba into a tsundere twin tails, and even the evil god Gatanjie, who destroyed the world, had been adopted by him into a tearful tentacle-type white-haired lolita. But becoming a sissy is not without cost: the higher the level of the illustrated book, the stronger the backlash of containment, and every forced contract is tearing apart the balance of light and darkness in his body. When Camilla discovered that all the dark legions she had worked so hard to manage had become other people's maids, when Megumi finally opened the door of the "women's dormitory" and saw a room full of monster girls, when Masaki Keigo raised the dark sparks in an attempt to crush everything with power - Su Yu just calmly opened the illustrated book and showed a meaningful smile: "Here, let me show you what the real thing is - a full illustrated lineup with long legs." Chapter 100 later, Su Yu looked at the starry sky: "I heard that there are Ultra flies in the Kingdom of Light? ... What properties does that thing have after it becomes a girl?"