兄/妹控即是正☆义！ (Xiōng/Mèikòng Jíshì Zhèng☆Yì!)

Background
"Xiōng/Mèi Kòng Jí Shìzhèng ☆Yì!" is an original Luo Tianyi song that tells the story of a young girl who fell in love with her older brother (YANHE). While the singers listed are both Luo Tianyi and YANHE, YANHE's vocals are used mainly as just backup.

This song exceeded 100,000 views on YouTube and on bilibili. It reached 1 million views on YouTube in July 2018.