Desire Detection summary:

Miki, being the eldest son looks after his siblings by working on several part time jobs ever since their police officer father who raised them single-handedly, died in an accident. One of these days, when panties started disappearing from their laundries, Miki suspects Tsukasa Shinokawa, a stranger who one day barged into their house & proposed to make Miki his bride? But later found out that Tsukasa Shinokawa is a cop who later caught the stalker moreover he is a weird oddball