BanG Dream! Girls, I Become a Hero Here

[Male-Focused Protagonist] [Completed, 1.3 Million Characters] Bandori (Ninth Band) + Magical Girl Site (a few crossover characters) + Kamen Rider + QB. An ordinary young man, Ichinose Kanade, awakens memories of his past life. The will of Earth tells him that this world is on the brink of destruction, and monsters from the Kamen Rider world of his past life are invading. To drive them out, Ichinose Kanade must choose people of destiny and turn them into qualified warriors. But no one told him that these chosen ones would be the part-time girl he met at work, the older sisters who had always looked after him, the friends he made as a boy, and the older sister he had grown up with. To spare them the burden of a warrior's fate, he decides to handle everything himself.

PS: The protagonist is weak in combat at first, has a twisted personality, and is a big siscon. He will gradually grow stronger.

PS2: Contains lots of character torment, voice actor jokes, Kamen Rider jokes, and plenty of original forms.

PS3: I'll do my best to make it understandable even for people who haven't seen the original works.

PS4: I have an older completed novel on this site with 1.3 million characters. It did terribly, but I never dropped it.