DearS: Is It A Golden Ball?
DearS: Kin no Tama desu no? · 金の玉ですの？
Synopsis
Miu wins the grand prize in the local shopping district raffle, which is a free pass for up to four people to Yuniataru Studio, a spa resort. She decides to take Takeya, Ren and Neneko since her grandparents couldn't attend.
Studios: Hal Film Maker
Source: MANGA