In Search of a Beautiful Future

Because of his parents' jobs, Lucas, who is of pure German descent, grew up in China and was isolated by the other kids as a result. Even so, he still had an ordinary, happy life. He spent his days in a peaceful yet tangled relationship with his stepsister Su Kui, his friend Liu Xu, and his friend's younger sister. But one day, the younger sister of Lucas's childhood friend appeared before him again. Then even Lucy, his former stepsister, showed up! Aren't there way too many little-sister characters?!