Indonesia’s strict anti-pornography laws (UU ITE and UU Pornografi) prohibit the possession, distribution, and viewing of such material. However, the very nature of its prohibition makes it a subject of intense curiosity.
The Indonesian subtitle you mentioned, "Hubungan Terlarang Mertua Dan Menantuny..." , translates to "The Forbidden Relationship Between Mother-in-Law and Son-in-Law." Original Title: 夫の居ぬ間に… 姑と内緒で。