According to the relevant laws and regulations, it is not illegal to have sex with a couple of college students who have reached the age of 14 and the parties voluntarily open a house, and there is no legal restriction.

Relevant regulations "the Supreme People's Court's Reply on whether the perpetrator does not know whether the sexual relationship of a dissatisfied 14-year-old girl constitutes rape".

Whoever knowingly has sexual relations with a young girl under 14 years old, regardless of whether the young girl is willing or not, shall be convicted and punished for rape in accordance with the provisions of the second paragraph of Article 236 of the Criminal Law; The perpetrator didn't know that the other party was a young girl under the age of 14, and both parties had sex voluntarily, without causing serious consequences. If the circumstances are obviously minor, it is not considered a crime.