Is there something wrong with Alpha marking Alpha?

#campus ABO#, #AA# Yu Chengsong from No. 1 Middle School is one of the top alphas in ten thousand. He is 89 meters tall and has a leg length of 1 meters. He looks good and has good grades.The only downside is that it is rumored that Brother Song is "not close to sex".One day, this boss who had always sat alone was suddenly forced to sit at the same table by the head teacher.This warrior is called Yin Gu, who is also 89 meters tall and has long legs. Compared with Yu Chengsong's snarky and unruly face, Yin Gu is handsome and gentle, and he smiles at everyone, which is well received by the whole school Favored by teachers and students.Only Yu Chengsong knew that his new deskmate was a cut-throat, the more good students he was at school, the harder he would be in fights after school.With that handsome face that is harmless to humans and animals, he is full of flirtatious words to him all day long.As a powerful top Alpha, Yu Chengsong could easily survive his susceptibility period, until he had been in contact with Yin Gu for a month, and the susceptibility period suddenly broke out early.The susceptibility period this time is different from the previous ones, and the pain and suffering are countless times greater than before.Yu Chengsong was brought to the infirmary by Yin Gu, feeling so sad that he wanted to harm himself.Yin Gu grabbed his hand, leaned over slightly, showing the back of his neck, and said with a smile, "Try it." Alpha's susceptibility period can be solved by Alpha marking each other. As long as you can endure the extreme pain for half an hour, you will be safe.But almost no one can bear the pain of half an hour.One time, Yin Gu was in a susceptible period.Yu Chengsong touched the back of his neck, and said teasingly, "If you don't cry in pain, you will be 'on' from now on." Yin Gu raised his eyebrows: "There is such a good thing." After one night, Yu Chengsong Regretfully hitting the wall, impotent and furious.Why doesn't the mark hurt at that time? ? ?It didn't say in the physiology book, fuck! ! !Tips: 1. Elegant and easy-going on the surface, violent and crazy on the inside, full of flirtatious words and offensive X campus boss, ruffian and vicious tongue, flirtatious but not flirtatious offensive Shou 2. Mutual flirtation and mutual favor, double academic bully, not retaliation, when in love Adult 3. The copywriting was written on May 2021.5.21, [-], and screenshots have been taken. Content tags: Qiangqiang Fantasy Space Sweet Text Campus┃ Search keywords: Protagonist: Yu Chengsong (Shou), Yin Yingu (Gong) ┃ Supporting role: Column Double A " The susceptibility period was hooked by the enemy" is over