[Urban Daily + Warm Healing + Non-blood Family + Cold Royal Sister] His parents died unexpectedly, and 13-year-old Gu Yan became a "trailer" who depended on others. What greeted him was a cold warning from the cold elder sister Shen Qingqiu: "Don't cause me trouble." Just when he was desperate, a [Heart-warming Handbook] was quietly activated. [Task: Make a breakfast for the sisters] [Task: Clean the house]... In order to survive and for that little bit of "warmth", Gu Yan clumsily learned to cook and clean. From a burden that everyone despised, he gradually turned into a "snail boy" that amazed his sisters. The gentle second sister and the cute third sister gave him the warmth of home; and the eldest sister who said "trouble" but clumsily took care of him all night when he was sick allowed him to unlock the ultimate talent - [Super Learning Talent]. From then on, academic masters were born and geniuses awakened. He is Legally Blonde's "plug-in brain", the "muse" of great writers, and the "chief consultant" to talented dancers. When the former "troublemaker" grew up to be the "little pillar" who could support her sisters, the aloof eldest sister finally discovered that the boy she despised the most at the beginning had unknowingly become the warm sunshine she wanted to monopolize most.