Checkmate

The game started and within half a minute Isamu was losing pieces left and right . This further encouraged Sona to continue . Tsubaki watched everything as her eyes constantly inspected Isamu . There seemed to be no foul play involved. 

Sona saw that she was winning and decided to slightly relax.

" Why did you ask such a ridiculous thing if I may ask. For me to be your girlfriend publicly ?" Sona asked.

" It would be funny " 

" Funny ?" Sona raised an eyebrow . 

" Yeah , can you imagine the look of people's faces especially the reactions of the underworld when an heir to the Sitri starts dating a fallen angel ? That would be pure comedy " Isamu chuckled 

Sona raised an eyebrow . Isamu seemed deranged in her eyes and they never agreed that the underworld should know.

Never the matter she was going to win none the less . Did it really matter the opponents proposition if she was winning ?

" Checkmate " Isamu said breaking Sona's thought .

" What ?" Sona asked incredulously.

" I said checkmate " Isamu repeated.

Sona checked the board and it was indeed checkmate . She had let her guard down believing this to be an easy win yet she was thoroughly mistaken .

She glanced at Tsubaki not believing her eyes . Did Isamu perhaps cheat ? But can you cheat in chess ? 

Tsubaki shook her head at Sona .

" Unfortunately this is Isamu's win " She said.

Isamu smirked at Sona . He stood up from his sit and approached Sona . He leaned to her when Sona was still in a daze . He stole a quick kiss on her cheeks making Sona recover from her stupor and blush madly . She however did not do anything .

This was her loss and she was not so rude as to reject that show of affection. In short she believed in honor and she especially honored her words.

Tsubaki blushed seeing her kaichou like that but did not say anything . If Sona did not protest that meant she was ok with it. 

" See you at school darling~ " He said in an enticing voice before walking upstairs. 

Sona further blushed at that name . As Isamu changed to his school uniform he couldn't help but grin. All according to plan.

Boredom was just the tip of the iceberg for the reason why he proposed such a thing . The main reason was actually pretty simple , protection . 

For the past few days he had been recalling things to do with Dxd and what he found out was that it was much more dangerous than he had initially thought. Furthermore Rias was desperate and her desperation would heavily hinder his training . So how could he get protection and be rid of a nuisance ?

One was to completely work hard day in and out without rest until he was the pinnacle of strength. This might seem the like the easiest way but over training was bad. 

It destroyed foundations , well at least until soul wandering level. And even in that stage rest was important. The greatest benefits were not realised by overworking one's self to the bone but rather by maintaining a good ratio of work and rest . The creator was no fool when he implemented sleep into the human life. 

So overworking was obviously out , then the next one had to be reliance. Joining the peerage might have seemed like the best way to go but with the main character there , it was bound to be hectic. He had to choose the next person in mind , Sona . But how to influence her ?

He needed to think and recall everything about Sona. Then it hit him , her personality was her weakness. 

She was prideful like Rias , quite strict on her peerage and herself and best of all she was an honourable person . And would you look at that , she had promised to marry anyone who would beat her in chess. So all Isamu had to do was beat her in chess. 

How would he achieve that ? That was what haunted him but luck seemed to be on his side as the poor prey delivered itself to his jaws.

Now to make her initiate the game was simple , promise her something her greed wouldn't ignore and vaguely point the way to go. She prided herself in chess so it was a certainty that she would choose that. 

Finally beat her in her own game and claim the reward. She would be honorable in her part and deliver what she said. She would also further go as much as to try her best to woe him to marriage due to her agreement with her parents.

The only downside of this plan was the whole marriage thing . He had a bad experience with those things but he guessed it wouldn't be that bad right ?

So why go for the relationship thing instead of protection ? Between a lover and a contractor , who do you think would get the most protection ?

After changing his clothes , he walked out to find Sona waiting for him at his doorway . Tsubaki was nowhere to be seen . 

" Where is your queen ?" Isamu asked.

" She has gone to replace me in school for some while as we talk " Sona said. 

"Sure , what's up ?" Isamu asked as they begun their journey to school .

" Umm " Sona hesitated as a blush fell on her face . 

" How should I act to be your girlfriend ?" Sona asked.

Isamu was surprised by her question . Sure she was honorable but having honor to fulfill your word did not necessarily equate to care . So Isamu actually expected to face some opposition in the beginning especially since their first meeting wasn't so great.

" Wow to be honest I expected a little coldness from you , sure you would agree but to just accept everything ? And here I thought you hated me " Isamu joked.

Sona didn't say anything . She understood what he meant by that .

" I am sorry for previously acting rudely to you . I was quite stressed that day " Sona apologized .

" I understand and as for the answer to your question I do not think I can answer you . That is something you should understand yourself " Isamu said.

" I see " Sona mumbled before she extended her hand to his and grabbed it . Isamu was getting less and less surprised by her actions . Their fingers intertwined as they walked hand in hand. 

They now looked like a real couple .

However since they were not used to each other they thought it weird but no one initiated the change so they walked silently for some while before Sona spoke again.

" Why did you ask us only to remain a couple publicly ?" Sona asked.

" Because I thought it best to give everyone their freedom . Either way works for me to be honest but I don't want to hurt you when I get other girls " 

He actually didn't care about her and he was hoping they don't lean in the actual relationship pathway .

" You are just as perverted as the rest but I don't mind " Sona said.

" What ?" Isamu asked.

" I said I don't mind . I also know you didn't actually do this for fun . Most people like you want protection and who better to receive it from than the Sitri heiress " Sona said.

Isamu was quiet . 

" I'll provide it for you but you have to be serious about this , no publicity stunt or something . "Sona said. 

Isamu just looked at the short haired lady in surprise. Turns out Sona was smarter than he believed. 

" You know I am an asshole , I will get many girls " Isamu tried to threaten her. .

" As long as I am the first one I do not mind " Sona countered.

Isamu didn't argue .

" How about we get to truly know each other before you actually make further rash decisions. "

" Fine , I'll be moving in to your house by the end of the day " Sona said making Isamu sigh in defeat. 

He really underestimated her .

" Just don't disturb me when I work out " Isamu said .