People in Zongman, double wear Godkiller

Luo Guang traveled to a fusion anime world that mixed the worldviews of DXD, Jujutsu Kaisen, Dark Rally, and Ghoul.
After his physical body became smaller, he didn't awaken his golden finger until he was twelve years old. As long as he practiced, he could become stronger and stronger, and he was also given a portal function.
Of course, as a time traveler, you naturally cannot do without the novice gift package. You start with a demon-killing holy sword, Esther, which can kill enemies and warm the bed.
Soon, Luo Guang became stronger, but he was not bald yet.
Baoyue Night Snack: "...Even if all the graduates were gathered together, they would still not be his match."
Rias: "Rias, Rias, how could you be so stupid."
Zhiqu Cangna: "Listen to me, thank you..."
Esther: "I was here first!"