Just used the name 'Midorima' because that guy is a doctor in those Kuroko no Basket fanfictions. I forgot about the surname issue like you follow your Father's surname so I am repenting by using 'Nishikino' too. Assume that there are many peopke with the surname 'Nishikino'. Enjoy! Apologies if Maki is out of character...
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We were in a hospital ward. Someone wearing a doctor's coat was making his rounds. Mother was also trudging in his direction. She was in the same clothes as when Grandmother passed away. They bumped into each other and had apologised to each other. Realisation struck me and I realised that that doctor was Father. They were introducing themselves.

"Why are you here, Nishikino-san?" Father asked Mother. Upon hearing the question, tears stremed down Mother's cheeks and she sobbed. Pity for Mother made my heart ache. She was so devastated...

Father was consoling her. He rubbed her back and hugged her awkwardly. After a while, Mother was fine and she thanked Father. He had a concerned look on his face ad he offered to drive her home. She declined the offer and left. A thought bubble appeared over Father's head.

I love her! She's so vulnerable and devastated, it makes me want to take care of her and nurse her back to happiness. Is it love at first sight?

It was. So that was how they met, Mother and Father never told me how they met...

-Time Skip-

We magically appeared in the hospital that Mother was in when Grandmother passed away. It seemed to be another day as Mother was wearing a black trench coat with a red and white polka-dot sleeve-less dress inside. She was entering a doctor's office. The name on the wall read- Nishikino Midorima. "That is...that is...my Father's name!"I stutter for no apparent reason. "Let's enter the room nya!" Rin exclaims. We follow her and our surroundings change from an empty hallway to a doctor's office.

"Midorima-kun," Mother greeted Father. He nodded. Were they going to do something romantic? I hope not...

"Rozu-san, where do you want to go for dinner?" Father asked Mother with adoration in his eyes. He was obviously a Rozu-Nishikino-the-idol fan.

"You had a long day at work. Dakara...you will choose," Mother said, shifting restlessly.

"Then it will be a surprise!" Father said and Mother gave a peck on his cheek. Father's face became a little pinkish. They started doing all sorts of lovey-dovey actions. I looked on with an indifferent face while one by one, the others started to face the other side.

"Maki-chan! How can you watch those...disgusting actions!" Umi exclaimed while closing her eyes. I shrug. "Ara ara, Umi-chan, are you asking for this?" Nozomi asked while she wiggled her fingers. "Kya! No!" Umi cried as she stood between Rin, Eli and Nico.

"Nozomi-chan, stop it! You are becoming like the two love birds over there," Eli said with a laugh. My parents seemed to have stopped their...affectionate actions and Mother was turning the door knob. We ducked out and followed Mother out of Father's office.

Kotori did a head count and cried out worridly, "Minna-san! Hanayo is missing!"

"Nani?!"everyone exclaimed. Panic was like froth out of a can, fizzing in me. How could Hanayo disappear? She was with us just now!

We heard a cry from Father's office.

"Darega tasukete!"

We heaved a sigh of relief. Hanayo was just in Father's office. "Hanayo-chan, just walk through the wall," I advised her. She did what I told her to do and she was on the verge of crying.

"Rin-chan! I was so scared! I thought I was alone!" Hanayo squeaked. I strolled over and patted her head. "At least you are fine now, why did you not walk through the wall?" I asked with concern.
"Hehe...I forgot...gomenasai," Hanayo admitted with a sheepish smile.

-Time skip-

We appeared in some kind of restaurant. The restaurant had a chandelier fixed on the center of the ceiling and everything about this place screamed 'expensive' and 'for the rich'. Why were we here? Was Mother and Father here?

"Maki-chan, I think I see your parents nyan!" Rin exclaimed while placing a hand above her eyes. We follow her gaze and catch sight of Mother and Father. Mother was wearing an expensive knee length dress with stilettos. She also wore earings and had her hair loose. Father was wearing a grey suit and had his hair combed neatly. Thought bubbles appeared above the two of them.

(Father): I am so lucky to go on a date with such a famous and beautiful lady! I love you, Rozu-san!

(Mother): Urgh. I am probably dating the most boring person...but it is all for Mother!

"Wow...your father really loves your mother Maki-chan," Kotori commented. I nodded. What would happen next? That was something interesting. "Let's go closer," Hanayo suggested. We strode through waiters and tables and were standing near Mother and Father's table. We had found a fountain in the middle of the room and was sitting on the smooth, marble surface that keeps the water from spilling out. Honoka gazed at the food adoringly and longingly and swiped food from the trays the waiters were holding. The waiters and customers did not notice the food disappearing.

"Mmm! Oishii!" Honoka mumbled as she stuffed her mouth with food. Umi shot her a glare and chided her for being a glutton. Honoka ignored Umi's death stare and continued munching. All of us giggled at the sight.

Suddenly, the sound of the cutlery clattering, the chatter of thr customers and the footsteps of the waiters ceased. What was happening? Why was it so silent? I scanned the surroundings and caught sight of the cause of the silence.

Father was on one knee and presenting an small,open box to Mother. He had a puppy-like look on his face and seemed to be begging her to acceo whatever was in the box. She nodded with a fake smile plastered on her face. Father slid something on her finger. It caught the light and glinted.

It was a ring.

Father proposed to Mother in a restaurant? They did not tell me that too...why did they have to hide it from me?

Everyone applauded and squeals and whistles were heard. "Congratulations Maki-chan," Honoka told me with a serious face. Everyone burst into giggles and we all had infectious smiles on our faces.

I felt that stretchy feeling and we appeared back at the church.