I think some people are confused because this might be their first guide guideverse story but here is some lore since I've probably read dozens in this genre: while some authors make slight differences in the lore kinda like how vampire and werewolf lore has different takes, there are some common elements:
- in general, guides do not need to have sex with espers to provide guiding, but it is portrayed as the most effective method. So, no, ML didn't need to have sex with his brother to be guided by him. He probably held his hand and that's it.
- some stories portray guiding by your dedicated guide as more effective meaning that the act of becoming a dedicated guide increases the compatibility. Other stories show that once you have a dedicated guide, you can no longer be guided by anyone else ever again.
- some stories use a matching rate to determine the compatibility and the effectiveness of guiding. This depends on the rank so, an S rank guide likely has a higher compatibility rate with an S rank esper than a B class guide. Other stories make the matching rate independent from rank and just turn it into some predetermined soulmate kind of thing.
- some stories have the concept of reverse guiding in which an esper forces the the guide without the guide being willing to provide guiding. Other stories do not even touch upon the subject of reverse guiding.
- in rare occasions, someone could be an esper and a guide at the same time. I remember at least one story where this happened but even in that universe it was super rare
- some stories show espers going through rampage when they are not guided. Other stories show them as being so weak and almost like going through heat (almost showing omega-like traits)
- there is no specific rule that says "espers are semes and guides are ukes" in case you're wondering because I saw comments about this in another story's section.
I think some people are confused because this might be their first guide guideverse story but here is some lore since I've probably read dozens in this genre: while some authors make slight differences in the lore kinda like how vampire and werewolf lore has different takes, there are some common elements:
- in general, guides do not need to have sex with espers to provide guiding, but it is portrayed as the most effective method. So, no, ML didn't need to have sex with his brother to be guided by him. He probably held his hand and that's it.
- some stories portray guiding by your dedicated guide as more effective meaning that the act of becoming a dedicated guide increases the compatibility. Other stories show that once you have a dedicated guide, you can no longer be guided by anyone else ever again.
- some stories use a matching rate to determine the compatibility and the effectiveness of guiding. This depends on the rank so, an S rank guide likely has a higher compatibility rate with an S rank esper than a B class guide. Other stories make the matching rate independent from rank and just turn it into some predetermined soulmate kind of thing.
- some stories have the concept of reverse guiding in which an esper forces the the guide without the guide being willing to provide guiding. Other stories do not even touch upon the subject of reverse guiding.
- in rare occasions, someone could be an esper and a guide at the same time. I remember at least one story where this happened but even in that universe it was super rare
- some stories show espers going through rampage when they are not guided. Other stories show them as being so weak and almost like going through heat (almost showing omega-like traits)
- there is no specific rule that says "espers are semes and guides are ukes" in case you're wondering because I saw comments about this in another story's section.