No. Erotica can be very effective without extremely raw sex scenes. It can focus on the sexual tension, the flirtation, and the build - up of desire. For instance, a story can be about two characters who exchange longing glances and have suggestive conversations, which can be just as engaging.
One great 'Muichiro x Reader' fanfiction is 'A Meeting in the Mist'. It beautifully captures Muichiro's somewhat aloof nature while gradually developing a sweet relationship with the reader. The descriptive language used really makes you feel like you're in the Demon Slayer world with them.
Well, it's important to set the scene properly. You need to create an atmosphere that makes the sex scene seem natural within the story. Maybe describe the dimly lit room, the soft music in the background if there is any. And also, use euphemisms and creative language. Instead of using very crude words, you can say things like 'their bodies intertwined in a primal dance'.
One common theme is the deep emotional bond between them. Given their relationship in the original work, fanfictions often explore how they support and care for each other on a more profound level. Another theme could be adventure, where they go on quests together and their relationship develops during those experiences.
The relationship development between Muichiro and the reader has to be believable. It can't be too rushed. A slow - burn, where they gradually get to know each other, understand each other's quirks, and form a deep connection over time is much more appealing. Also, the setting should be in line with the Demon Slayer universe. Whether it's in the Demon Slayer Corps headquarters or on a mission, the details of the world should be well - described.
Muichiro's death in the manga occurs during a particularly intense confrontation. His injuries accumulate, and he ultimately succumbs despite his valiant efforts.