One common theme is adventure. The two characters might go on some exciting quests together. Another theme could be friendship development. Starting from being strangers or just acquaintances, they gradually become closer friends or even more. And of course, there's often the theme of mystery, especially if Sebastian has some secrets that the male reader character tries to uncover.
Some fanfictions focus on the theme of protection. Sebastian might take on the role of protecting the male reader from various threats. Another theme could be the exploration of different worlds or realms. If Sebastian has some connection to a fantastical world, he could take the male reader there, and they would experience all kinds of new things together. There are also stories that deal with the theme of redemption, where either Sebastian or the male reader has something in their past that they need to make up for, and they help each other in this process.
Chapter 43, "How can sitting in business class be this uncomfortable?", is the clearest early answer because it turns Weibo's situation into a concrete plot event.
Chapter 56, "Popular Host L God Actually Supports Jiang Li?!", is the clearest early answer because it turns Lu Xingchao's situation into a concrete plot event. The chapter gives readers a real answer by opening on Lei Shen originally had no idea about the trending topics on Weibo.
Chapter 226, "Live Fortune Telling!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with What was all that before then?
Chapter 412, "Successfully Landing on the Island", is the clearest early answer because it turns Feng Shui's situation into a concrete plot event. It opens with After everyone was fully dressed, several teams began to disembark...
Chapter 419, "Survival of the Fittest, Only the Strong Survive", is the clearest early answer because it turns Nina's situation into a concrete plot event. It opens with Soon, these two leaderboards were also synchronized to Weibo in real... and closes on Besides, Jiang Li's analysis is correct..
Chapter 61, "Young Master Before vs After Going to the Countryside", is the clearest early answer because it turns Director Sun's situation into a concrete plot event.
Chapter 436, "Do You Remember Brother Daniu by Daming Lake?", is the clearest early answer because it turns Daming Lake's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Yu Li took the object that resembled a stone axe and weighed it in...
Chapter 131, "This Lady is Here to Travel", is the clearest early answer because it pushes Sweet into a new phase or setting.
Chapter 442, "Let's Form an Alliance", is the clearest early answer because a shaky connection becomes usable in the plot. Early on, Chang Rong was bewildered, "So, she seems pretty impressive." More.... By the end, After all, this had never happened before..
Chapter 350, "Methods to Enhance the Peak of Cold Resistance, Moao's 10th Town, Beishuo Yang Fa, Nightmare, East Ridge Lu Yun", is the clearest early answer because it turns Tiger Power Pills's situation into a concrete plot event. The chapter turns that into something concrete by moving from The first kind of Tiger Power Pill is unclear, but just by hearing... to There is an inherent conflict between the two; smuggling infringes....