Most official communities and platforms for Undertale (where Sans and Temmie are from) encourage family - friendly and positive fan creations. It's better to engage with the more acceptable and enjoyable types of fanfiction.
Writing or seeking fanfiction with sexual content involving characters is inappropriate and often violates the terms of use of most platforms. So, I would not recommend looking for such content.
Look to Chapter 116 for the clearest answer. It begins with But before the audience in the live room had time to continue brewing the..., keeps building through Jiang Yan quickly entered the room, and a few minutes later, he dashed out..., and lands on Their old Jiang family never had such twisted.
Chapter 160 is the strongest chapter-level answer because it starts from As the sky gradually darkened, the originally mild drizzle began to... and follows through on Then came Shu Yan and Jiang Li, while He Yun silently moved to the back of....
Look to Chapter 141 for the clearest answer. It begins with It had happened in the afternoon when Aunt Ying's son and daughter heard..., keeps building through They went straight to Jiang Li's door and insisted on thanking her., and lands on Jiang Li couldn't help but laugh and cry..
Look to Chapter 153 for the clearest answer. It begins with Wisps of smoke gradually rose from the small kitchen., keeps building through With the bubbling of the boiler and the crackling of the burning firewood,..., and lands on After leaning in, he saw Jiang Li and Zhao Lang inside the kitchen..
The best chapter pointer here is Chapter 169, "This is What Happens to Show-offs!". It opens with Everyone: "What?!" Seeing the shocked and bewildered expressions on their... and closes on Wen Jiaojiao, as if to prove herself to Jiang Li, rolled up her sleeves....
If you want the clearest chapter reference, go to Chapter 116. Early on, But before the audience in the live room had time to continue brewing the...; later, the chapter leans on Jiang Yan quickly entered the room, and a few minutes later, he dashed out....
The best chapter pointer here is Chapter 147, "Jiang Li, We Are Going to Meet Again". It opens with Xiao Xueyi nodded in agreement after listening. and closes on Only Jiang Li glanced back at Director Sun, and then took out her own....
The best chapter pointer here is Chapter 139, "I Will Help You Chase Shang Shaojing!". It opens with Wen Jiaojiao's live stream was inundated with a wave of question marks. and closes on The audience in the live stream didn't know about Wen Jiaojiao's inner....
The best chapter pointer here is Chapter 119, "Wen Jiaojiao is Poisoned!". It opens with What is Princess Wen talking about? and closes on For some reason, he always felt there was a mysteriously calming power....
Chapter 156 is the strongest chapter-level answer because it starts from Flash Change, who was always tardy, was late again today. and follows through on Soon after, the meditative He Yun also walked over..