The Achievement System：The Wonderful Harem life

Hsiang Tai, a sophomore at a university, lives a modest life with uncertain job prospects. After inheriting two apartments from his deceased parents, he is relatively wealthy. He embraces his passion for otaku culture, made affordable by his newfound wealth. However, his life takes a turn when he bounds the Achievement System.
The System provides constant feedback and rewards for his actions. Despite being rejected by a girl, he finds joy in being recognized as a "good person." The System boosts his self-esteem and belief in personal growth.
He encounters beneficial and strange rewards as he engages with the System. He gains confidence with the opposite sex but faces peculiar punishments like trembling hands while cooking. 
With time, the missions and rewards of the Achievement System become increasingly peculiar, leaving him wondering about its ultimate purpose. His life transforms through the System, unlocking his potential and leading him on an unforeseen path of personal growth.