Start by Eating Jake Jake no Mi

"..." 

While Masa was at a loss for a moment, he quickly held her and asked, "Why did you say that? Of course, I am happy that you are pregnant with me, and I am also anticipating our children." 

"Then, why don't you seem happy?" 

"Because I can't make my relationship with you proper." 

At this moment, he still hoped that he could avert her attention, but hearing his answer, Serafall snorted and asked, "Do you think I am an idiot and naive? I have decided to become your woman, so even if you don't marry me, it doesn't matter and... well, I will be lying if I don't want to wear a wedding dress..." 

When she imagined herself walking on the altar, wearing a wedding dress, her eyes shone brightly with excitement. 

"....." 

While Masa was speechless, he asked, "Do you want to be engaged with me too?" 

"I am happy to hear that but while I might appear silly, once again, I am not naive, Masa." 

Tapping his nose softly, Serafall, who sat on his lap, said, "My existence is still needed for the stability of the Underworld, so I know that I need to remain in this place for a little longer. At least..." 

"At least?" 

"At least until a new Leviathan is found." 

By then, Serafall felt that she could relax and focus on raising her child. Still, when she thought of the two of them, she couldn't help but smile, thinking that they would be so cute~! 

"...don't force our children to become your support on the Mahou Shojou show." 

"I won't!" 

Just after Serafall said those words, she hesitated for a moment and said, "But if he or she wishes to join, then it should be fine, right?" 

"....." Masa. 

"But don't escape from me, I know you must be thinking something else, so tell me." Serafall looked at Masa with a serious expression and asked, "Whether it is a fallen angel, seraphs, or even the gods of the other myths, I am ready to face them together with you!" 

"Er..." 

Masa was speechless, but in the end, he told her the truth about his exchange with Sirzech and how he planned to fight him during his engagement party. 

"...." 

As expected, Serafall fell into a deep silence, but before she said anything, Masa said, "Don't stop me. Don't let me be a coward. It is better for me to die after I give my everything than give up and be known as a coward, and as my woman, you should support me and believe in me, okay?" 

"...." 

Taking a deep breath as Serafall tried to calm herself, she nodded. "Okay, I believe you." While she really couldn't imagine how Masa would be able to defeat Sirzech, she could easily imagine how Sirzech would defeat or even kill Masa after all of that, especially when she knew what kind of obsession Sirzech had with his little sister. 

As Masa had done all of that to Sirzech's little sister, Serafall knew that Sirzech wouldn't remain silent, but then again, thinking of what Sirzech had done to Masa and how shameless this guy was, thinking that Sirzech could do whatever he wanted with Masa, she also felt angry. 

Yet, even so, she also understood where Sirzech's confidence came from since even if her power was powerful, Sirzech was on another level; he was no longer a devil; he was an entirely different type of being. 

Yes, Serafall knew that she was rude, but this was the conclusion that she came up with after she saw Sirzech's power during the Devil Civil War in the past. 

Masa was young, after all, but then again, Serafall, who had known Masa for so long, also knew how stubborn he was, so even if she had to admit that it was tough for her to believe in him, he had shown his quality by accepting her attack at that time, which made her officially become his woman. 

'In the worst case, I will just stop them with others' help.' 

This was the best course, she thought. 

Still, if Masa knew what she planned to do, she knew that he would curse her for not letting him die as a man if he was defeated, but not only it was for the child on her belly as she didn't want her child to be fatherless, she also loved him, and she didn't want to lose him. 

So, even if she was hated by him, she would do this, and she had been thinking of asking for the help of Ajuka Beelzebub and Falbium Asmodeus. 

However, the best way was for Masa to win. 

"I believe you." 

Leaning on his broad chest, Serafall looked at him softly and said, "So win, okay? I don't want to be alone to raise our child." 

"I will." Masa caressed Serafall's belly lovingly, wondering how such a miracle existed. He, who was known as the damned creature, a devil, could give birth to a child and have his own family, which was something that he had never thought of before as he had been too focused on defeating Issei. 

However, as Issei's problem was cleared up, Masa knew that he couldn't relax since he wasn't the strongest creature in this world. 

Regardless, he could see Serafall also felt the same way, and her eyes were also filled with love, which showed that even if they were known as evil creatures in the myth, they could still understand love. 

"Can we sleep together?" 

"Sure." 

Still, even if Serafall was older, and even had anticipated her child, she would be lying if she wasn't nervous as it was her first time to get pregnant, so she wanted him to be by her side. 

However—

"This thing is as lively as ever..." 

"...sorry." 

"I can't use that place, so bear with me, okay?" 

While Masa was helpless by the natural reaction of his body, he couldn't help but sigh in comfort when Serafall's gentle and delightful touch grabbed his stiffness like how she held Mahou Shoujo's stick, waving it around and having fun with it. 

Regardless, it was a peaceful night, but the next day, Masa's day was far from being peaceful, especially when Serafall's little sister came, standing before him. 

Her eyes that hid behind the glasses appeared sharp, and her expression was grim. Instead of being happy about her older sister's pregnancy and congratulating him as he got his first child, Masa knew well that such an exchange definitely couldn't happen at this moment. 

Still, Sona was his little sister-in-law, Masa thought, so he knew that he had to make their relationship better, and he took the initiative to talk. 

"It's been a while, Sona-nee." 

"Yes, it's been a while, but I never expected that we would meet each other again like this after you impregnated my older sister." 

"...." Masa. 

Sona had no mercy, and because of that, she looked at him straight and said, "Can we have a talk?" 

"...." Masa.