Space Speed Star Mark was a fantasy novel. It didn't explicitly mention whether Tian Hen and Lan Lan were together or whether they were lilies. In the novel, Tian Hen was an extremely powerful pilot with unique flying skills and mysterious abilities. Lan Lan was a girl with powerful magical abilities and was Tian Hen's ally and good friend. In the novel, the relationship between Tian Hen and Lan Lan was brotherly. They experienced many adventures and challenges together and helped and supported each other. Therefore, there was no explicit mention of whether Tian Hen and Lan Lan were together or whether they were a lily in the novel.