Black Butler, Vol. 34 (manga)

Finny and Snake infiltrate an orphanage where the students are divided into four "aptitudes," to which their schooling, meals, and facilities are tailored. Four of the older students are distrustful of the institution and one of its staff members-- a former member of the circus... The more secrets Finny and Snake uncover about the mysterious institution, the deeper they plunge, and more tangled they become...