A shy kiss at first

Sae slowly approached Makoto, nervously looking down. She built up her courage, then quickly went in for a peck on the lips, before retreating back just as fast, her face bright red.

"Oh no. Come on now, sis. You know you can do better than that" Makoto scolded. "More like this"

She grabbed Sae by the hand, pulling her in and planting her lips to hers. At first Sae was shocked, her body tense and her eyes wide. But after a moment, she simply melted into Makoto's arms, letting her sister take the lead as they passionately kissed.

Makoto pulled away, as Sae looked at her with bashful, fluttering, dazed eyes.

"Th-that was... I... That... You..." Sae muttered, not able to formulate proper thoughts at the moment.

Makoto simply giggled at Sae's lovestruck reaction.