Hoshiuta - Opening Trailer

The main character and his younger sister lived with their grandmother. He thinks, "I wanna repay her for what she's done to us when I'm grown up." He always thought about it. But several years later, she suddenly passes away.... "I couldn't repay her...." He gets depressed for a while, but he gradually becomes positive thanks to Yui, his old friend, and Midori, his friend. Above all, he needs to take care of his younger sister, Nanano. A transfer student also joins his class and a girl called "liar girl" appears in front of him.... Like this, his new life starts....