Shinseki+no+ko+to+wo+tomaridakara+de+nada+con+subtitulos+work: ((full))
(Staying the Night with a Relative's Child). The phrase "de nada con subtitulos" suggests a search for a Spanish-subtitled version of this work. Here is a story summary based on the premise of the series: The Premise of "Staying the Night with a Relative's Child"
The phrase (親戚の子とお泊まりだから) refers to a specific adult-oriented (hentai) anime/OVA titled Shinseki no Ko to Otomari Dakara (Staying the Night with a Relative's Child)