There’s Something Very Wrong with My Love Letter System

This book could also be called The Young Lady Will Die If She Doesn't Get Love Letters. After tearing up a love letter handed to her by a boy, Tang Yimo was immediately bound to a Love Letter System. [You have one month to upgrade the Love Letter System to LV2. The countdown starts now...] Soon, Tang Yimo discovered her ultimate target: Li Zheyu, the number one heartthrob in their grade. All she had to do was get two love letters from him, and the mission would be complete in no time. So she deliberately bumped into his arms when the bus braked. Li Zheyu glared at her in disgust, then brushed off his shirt. She wasn't going to give up that easily. “Sorry for getting your shirt dirty. Take it off and I'll wash it for you.” Li Zheyu: “Forget it. I've already decided to throw it away.” Later, she discovered they lived in the same neighborhood. But she never expected Li Zheyu to react by saying, “Are you stalking me?! Are you leaving on your own, or should I have the police come and escort you out?” Tang Yimo... Oh my god, why is this mission so hard?!