I assume you are referring to the Adult Video (AV) work with the code MIDV-699, starring Nagi Hikaru (なぎいひかる), produced by the label MOODYZ.
Conclusion
[ \mathcalL\textMICS = \frac2M(M-1)\summ<n\frac1B\sum_i=1^B\mathcalL_i^(m,n). ] MIDV-699
is a 2024 Japanese adult film starring Ishikawa Mio . While the code is frequently searched for the video itself, the film's full descriptive title translates to: I assume you are referring to the Adult