@jankop @Juunimeta Since you two are new to the idea, let me walk you through the concept. Forum Roleplaying, Play-by-Post Roleplaying or PbP is a style of role playing game. Unlike Tabletop or Live Action Roleplays, there is a focus on storytelling rather than rules, mechanics or even party cohesion. PbP games are often sparse on rules, with the game itself typically being freeform. What rules there are, typically are common sense. Don't control other characters, try to emulate a similar power level to other players, etc. Though more ambitious or professional games may have additional rules, like those emulating board games.
Usually, each person plays a single character, often formalized on a character sheet to show what their personality and capabilities are. In many ways, its more like writing a cooperative story than playing a typical game. Continuing the story from the previous role player's post from your own character's perspective. Like in a tabletop, there is a Game Master, typically the one who starts the topic. They will control NPCs, pose the plot to the players, push the antagonists and mediate disputes between players.
So let's say the three of us agreed to play a game together. As GM, I would post any rules or requirements I had, along with a character sheet I would need you two to fill in a thread like this, often referred to as an OoC (Out of Character or Out of Context). I would then make an In Character (IC) thread with the game's title, such as 'Flan-Chan's Delightful Quest (IC)'. My first post here opens the story and painting the starting location like a DM's opening narration. Jankop would then post their character's opening and reaction to what was happening. Allowing Juuni to follow up and interact with Jan, the NPCs or both. You two could then interact among yourselves and the NPCs, or I would make another post detailing something else happening.
@Saathi That's right. The options I listed are just my ideas for games. I wasn't sure what tone you would all be interested in, whether serious or comedic, adventure or slice-of-life etc. So I came up with a potpourri of options, some serious and others not, at varying levels of skill. That said, I am equally willing to play an RP premise one of you suggest. If I feel like one or two of these has enough interest, I'll run it for anyone interested. So, feel free to request more than one or suggest your own.
And since I know this will be a question, yes you can play your favorite Touhou characters for these. Yes, you can play an Original Character if you prefer. The only exception is if we decide to play Become Fumo, we aren't actually playing Touhou characters, but marketable plushies based on them.